DVR randomly recording shows

[aavz]

My DVR seems to be randomly recording shows on channels I don't even tune to.  I first thought it was someone else pushing record on another box in the house but since only the DVR (7100-P2) can record shows that isn't the case.  I am the only one that uses the DVR box and am not accidently pressing record;

[CRobGauth]

7100P2 is not a DVR.

That is an ordinary STB.

What shows/channels are recording?

[aavz]

You're right, the box is actually the 7232-P2, I mixed it up.  The thing is I only record hi-def channels and don't even tune into SD, yet HBO SD and another SD channel just randomly recorded.  I really don't know how this happened.