I've done my best to sync my list with the one Nu maintains on discord, so that shouldn't be the case.
Some users joined without signing up via either place, some joined and signed up in a way we couldn't assign them (eg HungryCrypto, as that Crypto.Games account does not exist).
The vast majority of users are assigned a team however and the few that are unassigned should not make a difference in the team placements.
Talking about inconsistencies...Some users don't even know their FAH donors name or at least they don't spell it properly (and yes sorry but the character case matters !)..well it's a mess , I did my best to corrected what I could but I am afraid I won't be able to do much more without proper infos.
Fixed some of those you pointed out.
You also should be able to convert every username to lower case from both the list I maintain and the folding stats, and then match them, as neither folding donor names nor Crypto.Games usernames are case sensitive.