Molar pain at that age is the WORST sleep buster ever. And it can be in disguise to top it off!!!! Ped explained me that sometimes teething aids (like motrin) can wind kiddos up (because of the ibuprofen, its active substance, in some bodies is like a booster...
). Sometimes the waking is due to pain "in disguise" because of the meds. That is, the meds help the pain not to be awful, but don't "kill" it so there's still discomfort that prevents them for deep sleep, hence waking at the slightest sound, change in temperature, phases of the moon... you name it.
Sometimes a combo of meds (that is, tylenol+motrin), an upper dosage or the help of homeophatic remedies seem to do the trick. Everything has to be approved and prescribed by the ped, so check it out with him/her first.
I just wanted to let you know that your routine/schedules look perfect to me and i would say that the wakings are due to teething, so they should be over once the molars are out... which can take a good extra month, so be sure to check with your ped how to attack the pain meantime.
Good luck!