tiger, I started a thread about your DD in "Comments Please" in this part of the forum--Ray
I don't see anything illegal.
Was the ump calling it because your DD slides her foot on the rubber?
A crowhop ocurs when the pitcher pushs off after replanting the pivot foot I see her her hip closing and dragging the foot, not a second push from her pivot foot. Slugger is right about closing the hips too soon and too much.Hillhouse is also right about her arm circle.