Hey guys, quick question about referals...

I have a few refferals on my account and one of them is a secondary account I'm using myself. On that account, the base free roll on the faucet is always 1 satoshi less than my main account. I.e. when the free roll on my main account is 6 satoshi, it's 5 on my alt and when it's 7 on my main, it's 6 on my alt. Now, this is suprising enough on it's own but it gets weirder... One of my refferals got her own refferals and one of them only gets 2 satoshi per free roll, while me and her get 6 or 7...

Now, I was under the impression that each tier of free rolls give the equivalent fractions of $200 for the max bonus. $20 worth for 2nd highest tier, $2 worth for 3rd etc, down to $0.002 worth for the base roll. But 2 satoshi is only $0,0006666 worth... But the other tiers are normal, i.e. base roll is 2 but 2nd lowest tier give 60+...

Why it that? Any ideas?