The judging was contrived to achieve the leader-board they needed. Matt was always going to be safe, so it was less important to keep him at the top (where he deserved to be after tonight's dances, IMO).
I, too, am disgusted by the sheer manipulation of the marks. They were clearly thrashing around for words to justify the over-marking for Scott and Pamela and under-marking for Matt. Absolutely crazy. If I were Aliona, I'd be very annoyed at the slurs about her choreography, while complaining about Matt's facial expression does not justify deducting all those marks. I want Kara to win, but Matt did the best dance of the night, IMO, and he must be bewildered after all that (unless the producers have taken him to one side and explained their cunning plan).
Hardly worth voting if they've got it all so stitched up, is it?