I noticed a while ago when I was Tier 1 (when the tiers were still in effect, obviously) that my paycheck rose to £7,099. When I upgraded it went back to £5,099.
I asked some people last night and a few people I know (can't remember exactly who) were getting £7,099 (all donators) - and I'm still only getting £5,099.
It's not an issue, I don't even notice any impact on my bank balance by paychecks, I just thought I'd let you know since you said this.
i asked this question long ago cause i to lost money by upgrading my reply was its not ment to be diffrent everyone gets the same paychecks must just be a little bug in the system that never got fixed