So about 4hrs all up during the day? Yeah I think about 4hrs is pretty normal for day sleeps at that age! Sounds like he might be dropping back to two sleeps - I found that when DD did that (I think around the same age too, 9mths) she'd be awake for about 3hrs, then sleep for an hour-ish, then awake for another 3, asleep for another 1 or so, then awake til bedtime.

Now she is starting to just have the one sleep, but it is a big one, normally around 1.5-2hrs.

Wow, crawling since 5mths!!! Walking can't be far off! There are a lot of developmental milestones that happen in the first 12 months so it could just be that he hasn't slowed down enough to get into a good sleep routine at night time. Eventually he will work it out!

Its something they don't tell you when you sign up to be a parent - something like 30% of babies are still waking overnight at 12mths!! It is not uncommon or unusual!

As I said, hang in there!!