Double listings? Item sold for the second time?

[glenbankloel]

This am woke up to a sale, YEAH !!!happy dance, but no! 

sale is for a necklace that we sold in March.

What the????

Went back and worked through the old listing to see if we had made a mistake and listed 2 instead of 1, but no, dates are all wrong, and some other minor stuff looks a bit odd.

So now have to contact the new buyer and apologise and refund.  

Has anyone had this happen, this is a first for us, and just wondering if this is occurring elsewhere.

Thanks in advance.

[purple*gecko]

OMG!!! Yes, this is happening to me a fair bit and its JUST NOT ON!!!! Im getting really sick of it. Ive had to contact my buyers four times this week. So I dont know whats going on but ebay need to lift their game.