I found that a BF too late would gear him up again; if he didn't feed to sleep then it was trouble. But he'd dropped all but the morning feed by 15m so that was no longer an issue.
Oh interesting you mention this. Both DH and I see a massive difference in DD after a BF. She will be falling down tired, grizzly, whiney and crying. Have a BF and then he happy, giggling and full of energy.

Do you think it's the BF causing have the problems with her waking right back up again?