Every night...

The nightly routine seems to be getting all screwed up. We have been on a magnificent track record of success with the girls going down right about 8:30 - 9ish and waking up around 8am ish the next morning. Recently that has CHANGED and I have no idea as to what caused it. Now they both fall asleep about that time but it's for a 'nap'. They both wake up about 10:30 or so and will absolutely not fall asleep again until close to 1AM. I have no idea how to fix it, I try making them something warm to drink, changing their daipers... anything I can think of but over and over again I go in and all lights are on and Devyn's crib is FULL (I mean FULL) of toys and books and Darian even somehow managed to get her chair into the crib a couple nights ago and Devyn woke up this morning with a HUGE bruise on her head somehow. We'll see how tonight goes because we have fully skipped the afternoon naps in case that was part of the cause of it.