Hi Julia - Thank you for your votes. I am glad you are enjoying the JNST.
There's no need to worry too much about the mathematics of it all: I put it all in the thread for two reasons - ONE because it's the easiest place for me to refer to it when it comes to adding up the points; and TWO in case anyone really wants to follow along themselves and make sure I haven't made any mistakes: that way it's transparent from the outset. Although the methods might be a bit (overly?) complicated, the theory is that it's intended to convert people's preferences into some sort of ordered list without undue weighting - an unachievable task really, but it's fun to work out ways of doing it, too.