Both of my kids started this at some point. The older one around 9 or 10 months, and the younger one now at 15 months. I switched the older one to 1 nap a day around 11 months old. Transitioning the little one a bit.
Except for the wake up time and lack of afternoon nap, my 15 month old's schedule is very similar::
Sleep - sometime between 6:45 and 7:15
Wake - usually sometime between 11 pm and 3 am for anywhere from 10 minutes for a bottle to an hour or so if he is teething or gassy. (he has feeding issues so still takes a bottle overnight)
Wake up - Sometime between 5 and 8:30 am. Depends on how the night went
Nap - Sometime between 9 and 10 for an average of 2 hours
Second nap - Varies widely depending on how late the first nap goes.
He is also starting to lose the 2nd nap. So, what we are doing is starting to limit the morning nap to one hour. Then afternoon nap after lunch or a bit later. Eventually, we'll drop the morning nap and when possible, move lunch to 11 and nap at 12. This will be a little hard though because of the schedule with the older one.