Yes they are, sometimes at the same time (but different places)
Sometimes it's just one, then maybe the other a later night.

I confined her to one room while I was gone today for about 2 hours.
It seems confining her to a room; i.e. at night, while we are out, has helped. That's why I thought it was behavorial, all though I don't know why she would do that.

However she would only do it while we were asleep - but today and yesterday, she did it while I was home and around the house - most of the time she's in the same room with me but she might nap elsewhere. It's never been a problem for her having free reign of the house, but definately not like her to have an accident while I am home.