The real problem Miami has is Alabama is likely not going to win that game and they're likely to lose by a couple scores. They'll be #10 and Notre Dame will move back to #9. And that'll be the end.
When you go back and look at the season, it's incredible how things broke for Miami:
Alabama
UGA - Bama up 3, Georgia goes for it on 4th down at the Bama 8 and doesn't get it. Then they get the ball to midfield and punt with 3:00 left
Missouri - Down 3 late in the 4th, Missouri has the ball at midfield and throws an INT
USCe - Tie game late in the 4th, Sellers fumbles the ball, Bama scores and wins
Auburn - Down 7 late in the 4th and deep in Bama territory, Auburn fumbles
Oklahoma - Bama turns the ball over 3 times and gives Oklahoma the win they need to stay in the playoffs
Oklahoma
Auburn - Run an illegal play and get a TD to win by 7
LSU - Down 3 points to LSU, hit a wide open crossing route to go up 4. Auburn turns the ball over on downs almost in the red zone
Miami
SMU - I don't know, pick one of the 12 things that if they just went the other way Miami wins
Duke
Duke somehow beats Wake
Duke down 7 to Clemson drives and beats them on a 2-pt conversion
Duke is losing to UNC and pulls ahead with 2 minutes left
Duke wins the tiebreaker based on conference opponent win percentage
UVA
UVA loses to NC State in a non-conference game
UVA beats UNC when UNC goes for two to win the game in OT and is literally an inch from converting it
UVA beats FSU in OT
Any of those things are different and Miami is in.