Bills on Sunday against the Miami Dolphins. It wasn't enough to overcome a lack of discipline and self-inflicted miscues in a 21-17 defeat.Sloppiness and mistakes spoiled a fine performance by the rookie quarterback www.authenticsmiamidolphins.com , who took another step forward against Miami. Allen threw for 231 yards, two touchdowns and two interceptions while adding a franchise-record for a quarterback of 135 yards on the ground, topping the mark he established one week earlier against Jacksonville.Penalties proved to be especially costly. The Bills had 13 for 130 yards compared to Miami's eight penalties for 89 yards. It continued a disturbing trend for Buffalo, which has the second-highest penalty total in the NFL behind only Kansas City.One week earlier, the Bills had 13 penalties for 80 yards in a game that saw defensive end Shaq Lawson and Jaguars running back Leonard Fournette ejected for their roles in a brawl. In Week 10 against Chicago, the Bills set a franchise record for penalty yards with 163.Two flags in particular were pivotal against Miami. On the Dolphins' winning drive, linebacker Matt Milano was called for a 25-yard pass interference penalty. Two plays later, the Bills stuffed running back Kenyan Drake for a 4-yard loss but were penalized 15 yards after defensive tackle Jordan Phillips received a taunting penalty.Two plays later, Ryan Tannehill connected with Kenny Stills on the winning touchdown pass."We always take ownership of all of it," Bills coach Sean McDermott said. "That's where we start. And you try and peel back the layers and say, OK, if it's pre-snap or post-whistle, those are the ones you've heard me talk about before 鈥?they're non-negotiable. Those are the ones that hurt. The ones that happen during the course of the play, which ones were aggressive penalties, which ones were technique-based ... certainly that's an area we must improve moving forward."Penalties on the offensive line have been an issue all season for a revamped unit missing three key starters from a year ago: Eric Wood, Richie Incognito and Cordy Glenn. The line had six penalties against Miami, with two fouls declined. Rookie guard Wyatt Teller had three of those penalties (two holding calls, one false start)."You look at false starts and holding, up front our offensive line, it's gone way past the point of where we need to have it to win games Miami Dolphins T-Shirt ," McDermott said. "We've got to get that corrected."Things won't get any easier up front with starting center Russell Bodine out for the remainder of the season. Bodine broke his leg against Miami and underwent surgery on Monday, McDermott said.It wasn't all bad for the Bills.Buffalo's 415 yards of offense were the most with Allen at QB and the most in a Bills loss since a 425-yard performance in a 31-25 defeat at Seattle on Nov. 7, 2016. Twenty-four first downs against Miami were a season-best and the most in regulation since Buffalo had 29 first downs in a 33-13 win over Cleveland on Dec. 18, 2016. And with 391 yards passing and 234 yards rushing, Allen has accounted for 625 of Buffalo's 742 yards of offense over the past two games 鈥?showing he very well could be the team's long-term answer at quarterback."I thought he grew for sure," McDermott said. "It looked like as the game went on he got more and more comfortable. ... It was nice to see him settle in."Miami Dolphins depth chart 2018 predictions: Mid-preseason projection The Miami Dolphins are mid-way through their preseason schedule, with two games complete and two games remaining, before the start of the regular season. A lot of adjustments and decisions are still to be made, but we also are starting to get an idea of how the roster may shake out once cuts are made.The league now allows teams to carry all 90 players on their preseason roster throughout the entire summer, cutting straight from 90 to the 53-man roster limit after the final preseason game. That gives teams a little more time to see some of their potential bubble players, while also keeping more players available for the fourth preseason game - a game where the starters and key contributors will play little if any.At the mid-way point of the preseason, we update our depth chart prediction for the team:Offense (25)Quarterback (2)Ryan TannehillDavid FalesThe quarterbacks remain the same as they have through the last two iterations of the depth chart prediction. Fales has not yet solidified the position, having struggled in the second preseason game, but he still feels like the more consistent of the options, with Brock Osweiler struggling and Bryce Petty not yet reaching playing time with the second team.Running backs (4)Kenyan DrakeFrank GoreKalen BallageSenorise PerryBuddy Howell continues to be the name that could pop onto the roster if the team is willing to sacrifice a roster spot somewhere else. Right now, I will keep him as a practice squad player, because I do not see the team keeping five running backs unless Howell explodes on special teams the next couple of weeks.Wide receivers (6)DeVante ParkerKenny StillsDanny AmendolaAlbert WilsonJakeem GrantIsaiah FordStill keeping the wide receivers at six, with Ford filling the final spot, but I am not as sure about that as I was a couple of weeks ago. Ford has played well, but he is not as definite a keep as he seemed prior to the start of the preseason. Leonte Carroo feels like he is moving toward the roster based on the team using him more on special teams Miami Dolphins Hats , but he definitely needs to have an impact in a game over the final two preseason weeks. Francis Owusu has thrown his name into consideration for that last spot, but needs to have special teams impact and a good offensive showing as well.Tight ends (4)Mike GesickiMarQueis GrayDurham SmytheA.J. DerbyShook up the depth chart order, but no change to the players making the roster. Gesicki appears to be the definitive starter at this point, with Gray coming in for two tight end sets (assuming his concussion does not become a long-term issue). Smythe and Derby fill out the roster position. The Dolphins gave a lot of special teams playing time to Gavin Escobar, so he could be a player they are evaluating for a possible roster spot, but five tight ends feels hard to keep.Offensive linemen (9)Laremy TunsilJosh SittonDaniel KilgoreJesse DavisJa’Wuan JamesSam YoungTed LarsenIsaac AsiataJake BrendelEric Smith fell off the projection after receiving just nine snaps in the team’s second preseason game, opening up a roster position for Brendel, who has been dealing with a calf injury. I am not convinced that is a locked in position, but it feels like the coaches are leaning that way. Mike Matthews played the most among the offensive line in the second game, with Zach Sterup playing one fewer snap. Both of those players feel like developmental options the team could try to stash on the practice squad or at the end of the roster.Defense (25)Defensive ends (6)Cameron WakeRobert QuinnAndre BranchCharles HarrisWilliam HayesCameron MalveauxAdded Malveaux to the depth chart here, mostly because the team seems to be using him a lot right now. He played 17 snaps this past week, and he seems to be someone the team likes. He will be buried on the depth chart, but he could be a young player the team looks to keep for another year. Defensive tackle (4)Davon GodchauxAkeem SpenceJordan PhillipsVincent TaylorWith the addition of Malveaux to the roster, a space had to be made somewhere, and that came at the expense of Jamiyus Pittman. The undrafted free agent has fallen off the radar during the two preseason games, which could be pushing him off the roster. The Dolphins will likely use Hayes, who is battling a hamstring injury right now, as a defensive end and defensive tackle this year, so there is still depth at the position with only four players on the roster.Linebackers (6)Kiko AlonsoRaekwon McMillanJerome BakerStephone AnthonyQuentin PolingMike HullThe linebackers have to start playing better, with McMillan appearing to make rookie mistakes - given his rookie season was wiped out last year due to injury - and Baker needing to adjust to his role as well. Anthony has been disappointing as well. Poling needs to make an impact on special teams Miami Dolphins Hoodie , and Hull’s injury could make the team have to find a way to keep another linebacker on the roster. Chase Allen and Terence Garvin are likely candidates to keep that spot.Cornerbacks (5)Xavien HowardBobby McCainTony LippettTorry McTyerCordrea TankersleyAt this point, I have no idea how to build the cornerback depth chart after Howard. Will it be McCain? Lippett? McTyer? Tankersley? It feels like that is the roster, with Fitzpatrick filling a role as well from the safety position, but it could be any combination of playing time for that group. Someone needs to take charge as the starter on the boundary, and they need to do it soon.Safeties (4)Reshad JonesMinkah FitzpatrickT.J. McDonaldWalt AikensThis may be the position I most tried to add a player, but cannot figure out where to find the spot. I wanted to get Maurice Smith on the roster, but I may not be able to do it. Jones, Fitzpatrick, and McDonald are a trio of starters at the two safety positions, while Aikens in a special teams ace. Special Teams (3)John Denney - Long SnapperMatt Haack - PunterJason Sanders - KickerNo changes here, but the battle between Sanders and Greg Joseph continues to be about even.Practice Squad (10)Cayson Collins - LinebackerJalen Davis - CornerbackThomas Duarte - Tight endMike Matthews - CenterBuddy Howell - Running backClaudy Mathieu - Defensive endCornell Armstrong - CornerbackDrew Morgan - Wide receiverJamiyus Pittman - Defensive tackleEric Smith - TackleThe practice squad was shaken up. Quincy Redmon, Connor Hilland, and David Steinmetz fell off the ten-man unit, while Mike Matthews, Jamiyus Pittman, and Eric Smith all are added. Cornell Armstrong and Torry McTyer swapped positions on the roster/practice squad, given McTyer is in consideration for a starting role.