One receipt reversed multiple times after being matched and vouchered

I have a tricky situation that looks like multiple receipt reversals against one receipt and a voucher. I'm not sure the best way to explain what I'm seeing so I'm going to try and make sense of it by giving you the information I have. The problem we're facing is there is in the GL inquiry it's showing negative balance because it appears that one more reversal was created than receipts. Can anyone tell me what might have happened? Based on the OV numbers it looks like 7 receipts were created but the user said she only created 4. Is