Knock off trackmaster weirdness

i have a theory that some of the models were official ones when they were first selling them before they ran out of them. It be could why the factory is producing new cursed versions of Rheneas, Skarloey, Stanley, Luke, Bill and Ben because they probably don't have the original molds of the characters chassis or something. I mean they do have some original molds for the characters like Peter Sam and Thomas, it just seems weird to me.