Hope you get your shit back.
I doubt the cleaning lady was in on it, but it does seem fortuitous they chose the day she would be there and that the camera was turned off for their robbery. I assume you've considered the possibility you were surveilled before the crime?
Yeah, have thought it through a bit. Cleaning lady changed the day she was going to visit at the last minute though, and intruder seems to have been caught off guard by the security system, so they seem equal parts brilliant and stupid. It may just be that they know our daily routine, in terms of our leaving early every morning, without knowing our weekly/alarm routine.
Grats on your grade, by the way!