[Igor Relja]

Yeah, unless you have high rating, collected championship points for that series take precedence. So unless you are regular participant in that series, you'll probably get lower seed. But even if you are regular, if enough people with very high rating register, you'll get pushed down. But that's not too common, AFAIK. I've seen only one post mentioning how somebody who wasn't regular in a series, with like 700 rating registered, and the the guy who was fighting for a championship was moved to server two and "robbed" of fair chance to fight (win on server 1 is not equal to the win on server 2).

You have some details here:

http://www.simracingsystem.com/regulation.php

EDIT: this is the thread I've mentioned: http://www.simracingsystem.com/showthread.php?tid=6419