Over the Weekend American Idol Betting Odds Changes

I always find it unusual how the betting odds can change over the weekend for who will win American Idol, but sure enough they have changed a bit since Friday, at least on the Pinnacle site. To be consistent I will continue to average them with the more static odds on the Bovada site, but there has definitely been a shift.
On Friday, both Hollie Cavanagh and Elise Testone were tied for being the long shot to win the competition, but now, for some unknown reason, the betting powers have decided that Elise is the bigger long shot, with whopping 78.88:1 odds on the Pinnacle site, whereas Hollie's have dropped to 51.730:1. (They sure have plenty of precision too!) And whereas Joshua Ledet and Skylar Laine both saw their Pinnacle odds increase from Friday to today (8.0:1 to 8.9:1 for Joshua and 4.5:1 to 5.56:1 for Skylar), Phillip Phillips and Jessica Sanchez both saw their odds drop slightly (1.833:1 to 1.763:1 for Phillip, and 4.5:1 to 3.65:1 for Jessica.) I would really like to know what happened over the weekend to make these numbers change, but who are we to ask?