hey hun!
It could be that she's ready for more A time or less daytime. I don't think she's going through the 2-1 just yet, but it may be just around the corner.
I've noticed, although she's waking earlier, she is getting 11 hours of sleep? At least 10.5? She can still do a full A time with that and I think you've been doing that.
One day, she had an A time of 4 hours and a bit and she did 1 hour and 15 - does she wake early? She did, more recently, 4 hours and she woke at 1 hour - happy? She could be near 4 hours and 30 minutes..and if that's the case, her second A may need to be longer. Babies usually increase their A time as the day progresses. So if she's at 4 hours for the first A time, she probably would need 4 hours and 30...etc.
I may be getting ahead of myself but I think just a tweak is needed..her A time after her nap to bedtime may need to be longer if she's getting a full restorative nap.
What do you think?
sarah