Can you post yesterday's EASY?
How often are you feeding her? Just curious-Why do you feel that she 'needs' to take in a certain amount? Babies often know how much they need and if she's refusing and she isn't sick, maybe she just isn't hungry?
I'm not sure if you have any of Tracy's books but she talks about 4 months as the prime time to transition babies to a 4 hour EASY. She says that 'when 4 month old (or older) babies are kept on a 3 hour EASY, they have irregular naps and often wake at night.' So it may not be a food issue that's waking her at night, but rather a routine issue or a combination of the two.
When I was on other baby forums everyone talked about 'the 4 month sleep regression' with dread, which I think is what Tracy's transition from 3-4 helps to avoid.
I know you are trying to get out of the 2 hour schedule you were previously on, but I think when you get your LO onto a 4 hour routine, she'll increase her feeds. Granted it is harder when they don't nap well, but the sooner you get her there, the sooner she'll adjust. So in the meantime your routine might be more of a EASAE(just leave enough time so she isn't nursing to sleep)S or EASASE and that's fine.
If you have BWSAYP book, instructions on how to transition begins on page 228.
Keep stretching her A times (which will stretch her feedings out), so that
a) she is tired enough to take a good nap
b)she will accumulate enough 'tiredness' to sleep through the nights
c)you can drop one or two naps
In regards to her 40 mins naps...have you tried increasing her A time to closer to 2 hours? Perhaps try that earlier in the morning OR after you get a longer nap so you know that she can handle it and see what kind of nap that gets you.