There are generally 2 difference types of remotes. Line of sight or RF (radio frequency). Most RF remotes have dip switch settings in the remote used to talk to the device they control. That way one remote can only talk to a device it intends to control without controlling other devices within a given area or distance. Example, 2 different TV's within a given area.
I was parked close to another RV that had the same TV that I had. My TV would change channels, turn on, and turn off by itself. Looking out my window I realized that when the person in the other RV was using his remote, it would effect my TV. I changed the dip switch setting on my equipment to stop the interference.
Then the fun began. Looking out my window, I could see the person in the other RV trying to watch TV. I would change my dip switch settings to match his. I played havoc on his watching TV. You get the drift.
You probably were parked close to another RV. More than likely he programed his device with his remote to turn off and on at specific times. That programing also changed the times on your device.
Time to consult your manual to erase the times.