It seemed like at first the meta-stackoverflow was the meta for all the mains sites, SF, SU, SO. But now they each have their own. If you visit SF or SU there is a link on the top directly to the respective meta (this is absent on SO though). Also when you view the other metas the REP is shared across the main site and the respective meta (this is not the case with SO meta).
I was just wondering if there was a reason for this inconsistency?