Yes, I was going to point out that the bishop could disinvite the order from his diocese.
But that would be the equivalent of firing off an ICBM. For one thing, he would then lose a valuable Catholic school--or what should be a valuable Catholic school if they manage to get themselves straightened out.
One place the Sills family might consider going to for advice is the St. Joseph Foundation, which specializes in helping Catholics with canon law problems. In particular, they endeavor to defend orthodoxy against the incursions of bullying dissidents.
http://www.st-joseph-foundation.org/
The Sills family should cut their losses and enroll Kaitlyn in a diocesan high school. Several of the stories indicate that this teacher was popular at the school, so she may be better off somewhere else.
bttt