...did they stay that way?

My toddler (he will be two next week) has the sleep habits of a teenager. He doesn't go to bed until 10-11 (sometimes later!) and sleeps until 9-11am. We aren't morning people so for now his schedule doesn't bother us at all. However, we are in talks about having another baby and it will be *brutal* if the second isn't a night owl and we have one going to bed at 11pm and another waking up super early.

I know toddler sleep can be all over the place but B's schedule has been like this for about a year now.