Not a huge strictly fan but have been dragooned into watching the results a couple of times. One thing strikes me, each week Tess says
In the event of a tie head judge Len has the casting vote
How ? without Len there are three judges, how do you get a tie with an odd number of judges. Unless one of them abstains which would begs the question why they turned up in the first place, three judges mandates a majority decision one way or another.
What you need to remember is that this is a light entertainment show, it's not a dance competition! It's a popularity contest, the judges keep in the competitor most popular with the public. Evidence, tonight. Jamelia had been in the dance off five times, Peter Andre the first time tonight. He was the most popular out of the two and so he stayed.