Randomly disconnected in Free Market and Ch 1 and 2...

I was trying to sell stuff but I can't even go in there on one of the computers I use. When I got on another computer to try and sell the scrolls before I knew it I had a person that floated and followed my screen for like 15 minutes and I was very afraid. I didn't think trying to sell scrolls was wrong but I know that person is not supposed to be following my screen like that.