odd stuff happening to me on ebay

I was just trying to sell an item. I clicked sell similar. Then it asked for me to put in my password for my account, so I did. I clicked to goto the next screen to edit my description and stuff and it asked for my pw again, so I put it in again. Then the whole entire description was empty, so went back and tried the process again and the next time I tried to the description part the ?? confirm bid screen ?? came up for some $300 dollar item and I freaked out and closed out my web browser and shut down my computer thinking someone may have been using my system or something. So then once I get back to ebay to sign in I see someone else's user ID in the spot where you sign in. Has anyone ever had anything like this happen before? This was very suspicious to me.

 

haha....i am just going to lay off ebay for the rest of the day today and go read or something.