I'm not sure about the A time because my daughter is the same age and has a bit less (even with a recent increase), but she is HSN. She has been doing the same thing recently though. I had a post about it, and there are lots of mamas of 2yr olds in the same situation. I moved the nap to 1:30 (from 1:00) and kept offering it. Some days she skipped it, some days she took a loooong time to go to sleep and some days she took a good nap, and now she's back to doing 2hrs. Seems like a developmental thing that a lot of them go through.