DVR viewing away from home

I recorded a movie I wanted to watch with my sister who also has xfinity internet. I went to her house and logged into my account on her computer so we could watch the movie. Under "Recordings" were a lot of shows I've never recorded that are not on my recordings list at home. The content that is on my recording list at home was not visible from the remote login. Absolutely none of it was there. Also, under "scheduled" there were a lot of things scheduled to record that I never set up. None of these recordings are my sister's either. In fact, she only has internet from Xfinity, not Xfinity TV and DVR.

1. Why can't I see any my DVR content when I log in at my sister's house? 

2. What's going on with these DVR recordings that are not mine and don't show up on my DVR list at home?