Illegal Pitches...
 

1) Is there any Fast Pitch rules set that allows what we call the "slip pitch," where the pitcher does a backswing, releases the pitch on the upswing then completes a full rotation after release. I know it is illegal in ISA, NSA, and NFHS. In a WFC game this weekend, I saw one not only thrown for a strike, but when the pitcher game up to bat at the beginning of the next inning, the umpire complimented her on her change up (meaning that pitch).

2) I started to post this under the "Cat" topic, but... what would indicate to you a flagrant enough crow hop to call an illegal pitch? Seeing the "pivot" foot pivoting again as the pitcher pushes off again? Seeing a cloud of dust as the "pivot" foot replants?

This is illegal in ASA, NFHS, and AFA, and probably most others as well. The illegal part is contining for a revolution of the arm after releasing the ball. Doesn't WFC publish a ridiculously short "guideline" rule book for their tournaments? If they did not state that continuing with a revolution of the arm after releasing the pitch is illegal, I guess it would then be legal.

Varies a bit with the rule set. Cloud of dust means nothing. If the pitcher pushes off again, that is definitely a crow hop.