J.B.
Hi C.:
We had the exact same situation for quite some time - happy baby, goes to sleep independantly and in her own bed, keeps a nice clockwork schedule on her own...but she would still wake up for the 2-3am bottle every night! Honestly, we didn't worry about it. It's just something they grow out of. It wasn't until around 12-13 months she started sleeping consistently through the night...and now, even at 16 months, she still sometimes wakes up for a middle of the night snack. My personal theory (not proven, so take it for what it's worth!) is that some babies have faster metabolism than others so their little bodies process food quicker and they get hungry more often...thus, waking up at night. I really don't know if that's true but, if so, it helps explain why some babies can sleep through the night as soon as 3-4 months and some don't until over a year. Be patient...and good luck with whatever approach you decide to take!