Same thing happened to me- I was able to get a 2:15 FoP on our last day with a 3:00 MagicalExpress pickup. I also tried for many days and finally picked up a 9:45am instead. Yay!
I don’t believe you can make both work- sorry. Tusker House will give you a 15 minute grace period and it will be virtually impossible to get through FoP in just 15 minutes (allowing 5 minutes to book it to Tusker) even if it were a walk on, which it won’t be. You could ride and hope Tusker House will take you 30 minutes late, which they very well might. The risk is that you’ll be turned away and lose your credit card hold, and only you can decide if it’s worth it.
I’m guessing it will be easier to change your breakfast reservation than to luck into an earlier time for FoP.