Let's not be too dramatic. It's likely the 8710 (and the temp. certificate) were filled out properly, and OKC just got it wrong. They're good folks, but they do make mistakes. Happens more often than you'd think. I got a AMES rating added to my ATP when it in fact was a commercial ride. A student took and passed the private rotorcraft helicopter ride (initial); the permanent ticket read ASEL.

Nevertheless and regardless, do as I did - give OKC a call and tell them of the error. They'll send a corrected certificate. IIRC 405-954-3261 .