C2 Score

A few questions:
1. Can anyone explain why a C2 score would fluctuate back and forth from 70 to as high as 97, which is happening with a recent system I have developed?

2. Awhile back there was talk about changing the weighted structure of the formula for generating a C2 score. Has this been implemented yet?

3. Does the C2 score determine the placement of a system in the Popular Systems (in my case Futures) page.

I am wondering the the C2 score is for an individual signal or does it include signals published years ago.

It seems its based on all signals of the developer …