sorry I'm a bit late to join the conversation! seems like you guys are sorted though..
I couldn't have said it better myself. Often times, their body is stuck in a habitual A time and they have their sleepy cues due to habit. Does that make sense? Even today, my lo acts so tired after an hour and half of being up. However, if I put her down I often get short naps at 3 hours. So I gently nudge her..
Of course, if they're sick, teething, growth spurts..they will need that sleep and the A time will need to be cut down.
Like tarakay said..there IS a fine balance. EWs can also occur due to the first A being too short and being like an add on to the night. Does that make sense? I understand that your lo doesn't like being left in the crib too long. Could you take her out and rock her in her room, with it still being dark in there? Or you could do an extra long wind down.
Don't go overboard with the increase in A time as you don't want her to get OT..she's getting to the age where 5 minutes here or there won't make a big difference but that at 7 months it still may cause OT.
Also, don't forget to only work on one A
Keep us posted!