American Idol Odds Shift Between Shows!

I am not sure why this happens but sometimes the American Idol betting odds change quite a bit even though the show has not been on the air since last Thursday. The front runners remain the same, but it is always the lesser known "mid pack" contestants that often switch around during the week. On Saturday, the odds showed Candice Glover and Lazaro Arbos tied at 12/1 odds, then Amber Holcomb at 14/1, Devin Velez and Paul Jolley tied at 15/1 and then Burnell Taylor at 16/1 with Curtis Finch by himself at 20/1 odds.  Now a few days later without any show broadcast the odds have changed. Now Candice is tied with Burnell at 12/1, Lazaro has dropped to 14/1 and Amber has dropped to 16/1. Angela Miller, Kree Harrison and Janelle Arthur have not changed on the top of the list and Curtis remains the same at the bottom. It is very strange. Here is my new ordered chart of the Top 10 contestants:
The only folks who changed were Burnell, Lazaro and Amber, and I have no idea why they did. I had thought Amber would be safe for a few more weeks, but maybe someone else knows something more than I do.