I don't know my true rank one website says 8k and even though I haven't been on kgs much it says 12k or 10k. And some other people say i'm acually 15k.

What can you accept as being "correct"? Server ranks have a tendency for great variation. Try to get a real world ranking; this can be much more meaningful.

There is no true rank. Every system will be slightly different. What people post here are generally what rank they have in the system they play the most or feel is most accurate of their play.

Anything that allows you to play with a 50/50 chance of winning is good.