I found that my DD's morning A time was a bit shorter than the rest for a long time, but when we were getting to the 2.5/3 hours + it seemed to catch up with the rest. My DD is a textbook/angel and usually has been a good napper as well. The 45 min naps for her have usually meant not enough A time, unless it's teething or milestones. You could try extending the morning A time a bit to start with and that might get a better 1st nap, and the rest of the day might fall in place behind it, or you might find the need to extend throughout the day.