Some kids just wake up at a certain time in the morning, regardless of when they went to bed. My son is like that, and my friends kids are the same way. My son ALWAYS wakes up at ab out 6:30 and my daughter always wakes at 7:00.... even if they go to bed at the same time or nap during the day or not. It is just their cycles and them.
Or, put your kids to bed at 8:00.
I would not leave the bottle in the crib (ie: tooth-rot), for your 10 month old... is that what you mean? Or is that regarding your 2 year old?
A 10 month old baby, should still be fed on demand until 1 year old. This is per my Pediatrician. And a baby this age will still wake at night...
Your 2 year old, is sleeping about 8+ hours at night... if he goes to bed at 7:30, then wakes at 4:00 to come into your room. That is 8.5 hours of sleeping... already. Plus the 2 more hours in your bed.
Most toddlers like to sleep with their parents. I know "I" was like that at that age and older, & I would STILL wake up, walk down our dark hallway, and squeeze myself in between my parents to sleep. I just missed them and was lonely, and would get scared at night by myself in my room. My parents let me. I outgrew it. It's not so unusual. And, kids from 2 years old begin to get night-time fears/nightmares/and miss their parents. Its common.
For us, we have a futon on the floor of our room... where the kids can sleep if they want or if I need to co-sleep with them. Thus, "our" own bed is not crowded. This works for us.
Well I don't think this helps any, but just know that your kids ARE normal & seem very regular and consistent... and that is good.
Getting a 2 year old to STAY in their room, by themselves all night... can turn into a battle. They don't yet have full impulse control developed at this age anyway...
Good luck,
Susan