Two 1.5 hr naps are average for this age. Have you recently transitioned to two naps or did you do it earlier? Just trying to get an idea of his sleep needs generally. Do you feel he's average, HSN or LSN?
With the wake ups during the night are they prolonged or do you feel he's in some discomfort and waking many times? How long has it been going on for?
Sorry for all the questions hun, just trying to get an idea of the bigger picture x