At this age, I don't think they need to have 2x1.5hr naps anymore and some do better on 1 shorter/1 longer nap, a pattern leading up to the 2-1 nap transition.
Our routine at 9 months was:
6am - wake
9.15-10 - morning nap (I woke her up)
1.30-/3-3.30 - afternoon nap
6.30 - bedtime
The routine is still about the same except on the days I let her sleep longer than 1.5hrs in the pm, I can get some resistance at bedtime... but I have accepted that during the transition period, its unrealistic to expect 12hr night.
So you could try shortening the morning nap to 45mins and hopefully he will sleep longer in the afternoon.
The av A times for 9mos is 3-4hrs
