Anyone having an issue with event receipts

My events page started sending out email thank you letters like a donation. However, the letter shows as an attachment on their page but not on the receipt series page. So, I'm assuming they really didn't go out. That said, I don't want them in their file since it's not an actual donation. I can delete them, but wondering if anyone else is having this issue. I've been on hold with support for what seems like forever, so I thought I would ask here. Thank you!