Cheating was/is common in horse world. Like it also did become more and more common in dog world when somebody could earn money with this . (show, export)
A lot of breeders will cheat for money...
And there are unfortunately also veterinarians who will do a lot for money... give big breeders signed health certificates before a litter is born, change chips, make secret teeth reconstructions, give wrong info about identity .... (and these things are really not only rumors!!)
Why somebody is surprised when all this horrible things also are happening in wolfdog world?
But personal I don't want to blame any specific breeder, nor I want deny any message of unknown member on this forum ....
I only can advice: think, be alert, always compare with standard of a breed, open your eyes and ears for other opinions, and make your own conclusions and opinions 
