Easy.
There is two different interpretations about the Salsette / CTM situation.
Since there is no official rule about it, one Interpretation tries to do find a solution a logical base:
Salsette says: One time, …remove when playing the trash cost. Obviously its not a trash, so CTM should activate on the first real trash.
The other interpretation uses other rulings and a state of game that is not part of the rules, but makes sense to them:
The trash cost are paid, so at that time, both effects trigger, and salsette gets priority, so CTM should not trigger again.
The thing is, neither of those is right, cause the text on Salsette is misleading and there is no official rule in the FAQ or anywhere else.
So both are perfectly fine and as long as there is no official ruling, judges have to pick one. So they ofc pick the One they agree.
No discussion will help here, just an official ruling.