Thanks for your comments on my previous post! They were really helpful.
So we're going to try something different. We've been doing naps according to information for much younger kiddos and we need to update. They've been getting up around 9am, nap at 11am-1pm, then going down around 4pm for that useless crib time and then bedtime is just all confused depending on if they slept at all during that evening nap. Since Teeny Tiny will go to sleep quickly whenever she's put in her crib, I hadn't realized that they've outgrown such short awake times. But I'm aware of it now!
So we're going to get them up between 8:30-9am, down about 1:30pm, up at 3:30pm (unless both are firmly asleep in which case we'll let them determine wake up time), then bedtime about 8pm. They may get an hour of pack and play time in the evening so I can make dinner and because we all sometimes need a little down time between play sessions.
They've been waking up earlier and earlier in the morning, maybe it's because they're getting too much sleep. Seems like blasphemy to me to consider too much sleep, but maybe that's the case!
I'll do my best to impose this new schedule on the girls for a week and see if they are able to conform to it and if it seems to meet their sleep needs.
And to answer the question about why they both go down when only one needs the nap - I do that for a few reasons. First, because if one falls asleep and the other is up still playing, I have to commit to that. If the second one gets tired while the first is asleep, I can't put her in her crib without waking up the first one. Second, the awake one then gets tired and wants to nap right when the sleeping one is waking up. It makes everything confusing and difficult to manage bedtimes and such. Third, I need recharge time (yeah, selfish, but it's an honest reason).
So I guess we're going to go more with Middie Biddies sleep schedule since Teeny Tiny would probably be growing into those same needs very soon anyway. Personally, I like Teeny Tiny's schedule better, it gives me more free time, but it's not about me now is it!