My first thought when I read your routine is that your 2nd A time was too short. And then maybe she is fighting the pm nap because she isn't tired, but by the time you try again she is OT.
So, you could try moving that to closer to 2:30/3...
Or, you can try limiting the first nap, and hope that that leaves her tired enough for a 2nd nap.
See how you go. My DS moved to 1 nap at 9mo, back to 2 for a few weeks whilst away on holidays, and is very firmly on 1 nap now at 11 months. For me, even a 45 min nap pushed the PM nap so late that bedtime was VERY late, so we just tried him out on one nap, and it went fine.