I didn't even know this was an issue, but my electrician is here now wiring up my brand new XPR-10A, and darned if we don't have the wrong switch. I did a quick search on here and voila, found this discussion.
He's apparently making it work somehow, it's going to cost me at least an extra hour...
Picked up a propane forced air heater on Craigslist... so I can warm up my garage... so I can finish painting the walls... so I can properly place some big cabinets against the wall... so I can clear floor space... so I'll have room for the Bend Pak XPR-10A I'm going to order next week. :D