Here are the settings: http://puu.sh/hF0c5/7229e7621d.png
The service wasn't updated in any way, nor was it upgraded. It was first created in April with the coupon applied, which is fine, then it recently invoiced the service again with the coupon still applied. Additionally if this is any help, it has not been paid for only invoiced. This was renewed via cron just recently.
** It's also occurred on another service renewing soon as well, I would assume any other service using this is code will fall under the same circumstance.