Yeah, it hurts to see people end up like this. I'd love to believe people would assume that since your level resets to 1 after CC, any levels you're short of 50 pre-CC would be lost, but some people aren't experienced gamers who make that assumption/connection. "It sounds like a quick jump in power, OK!"

Ultimately, the biggest issue is that if you make such a mistake with premium units (read: anything above Silver) then it is essentially impossible to correct without re-rolling the unit, feeding the "mistake copy" to the new, properly raised copy, which isn't really correcting it in the first place.