Unfortunately I do.

She goes to bed around 8, and usually sleeps till around 12, then she's up at 2, 4, 5, 6, and usually 7 for the day. This is a "normal" night for us - sometimes she will be up FROM 4-6, those are the nights I call "bad" nights. (when I say "up", I mean she is actually asleep but restless and thrashing around and fussing). Maybe once a week she has a night where she only wakes up twice. Sometimes we do get into a good phase where she strings together a few good nights. This happened last week, and Sunday night she STTN for the first time in her life (17 months), but then last night she was awake from 11:30 to 1:30, so who knows?
At least we know we aren't alone! If you figure out how to solve it, let me know please!! We have 3 kids in a 3 br house so her crib is in our room - so that really limits what I can do.