User Activity

I haven't come across this before. An item I was selling sold to a buyer who over the course of the auction bid 4 times - 2 of these bids on the day of the auction up to 1 hour before it ended. Almost as soon as the auction closed eBay notified me of...
Hi,I wonder if this has happened to anyone else and, if so, if it is something that often occurs? I made an offer on an item which was refused. Out of interest, I decided to watch and see what the closing price was but, when I next looked on my eBay ...
I prefer not to use offers in my listings. However, if an unsold item is automatically relisted then eBay automatically applies best offer to the new listing. How can I ensure that this does not happen? Any advice/thoughts welcome. Thanks.