Item has been paid for, but listing shows over 3 says still to run

[tupennyrice]

I listed an item, starting bid 4.99 last Sunday. Today, Wednesday, someone has paid for it and it shows one bid and won at £4.99 but listing still running until Sunday. All I can think is that I have accidently allowed a buy it now as well. Is that possible? If so why hasn't it ended the listing? I'm not bothered that it was won already for starting price, although there was another watcher who might be cheesed off, I just do not understand how it can have been won but showing over 3 days still to go. Is there a way I can check the original listing? Thank you

[*guinevere*]

If it is the camping stove it is still listed on auction format and quite clearly shows that it has over 3 days to go, and is due to end on Sunday. 

You have  received one bid so far.

I don't understand how the bidder can have paid for it as they have not yet won it.

Double check your listing in case there is an ebay glitch.