Hi Steve,
While I can't be sure precisely what you did wrong for this to happen, assuming the item has not received any bids, you can remove the unwanted images by revising it via the following process:
1) Log into your eBay account and click the "Revise your Item" link.
2) Click "Edit Description"
3) Click the "Standard" tab on the editor.
4) Select the first unwanted image with your cursor and press the "Deleted" key.
5) Repeat step #4 for each additional unwanted image.
6) Save your changes.
I hope this information proves useful. If you would like further assistance, please file a support request using the appropriate link on our help page:
http://www.auctiva.com/free_auction_software_help/help.aspx-Mike