mel,
monika could be onto something for you.
i did the same for avery....against all i stand for and know about late bedtimes!
for a long time, avery consistently did 3.5, 3.5 and 3hrs for the longest time. then i noticed everytime i put her to bed, she was playing for 20-30minutes (until 8pm). i don't try to keep her up longer, but i had to tell myself that she was falling asleep when tired....and now she sleeps much more soundly right until wakeup time. Now that she is a consistent 3.5hrs for all A times, she sleeps much better.
maybe try this,
6 wake
630 bottle
730 breakfast
9 nap 45minutes
945 up
1000 small snack
1130 lunch
1230 bottle
1 nap 2hrs
3 up
4 dinner
530 bathtime
6 bottle
630 bed
hmm...that doesn't look much different?
i am not sure she is ready for a 30min nap in the am.....it might just be causing her to be overtired a tad. in the routine A times are 3hrs, 3.25hrs and 3.5hrs, but that tiny 15 minutes might make a huge difference in her day.
hth
or are you more confused by me? lol
sami