It does because you broke the rules - the rules you made up - if even just a little. And even so, again; at this point there's no way to prove that the player in the other guild was actually the alt of a player in your guild. But does it really matter? The character was representing another guild - that's the point of guild games; for everyone to wear the same nametag. You had a player that didn't, so it's not a guild team, alt or no alt. Either we decide on the rules and follow them 100% or we don't and we just make teams vs teams, no guild representation what so ever.
Also, if you're going to push your agenda - what's to say that the characters from Criminal Club's team that weren't at the time in the guild, weren't just alts of members inside the guild? Obviously you would find such a thing acceptable, would you not? The only reason why you think 1 character exception is ok is because it supports your case, but that doesn't mean you're right. Maybe Criminal's Club read your arguments during the conflict with Anarchy Inc and thought "hey, this guy says it's ok to have characters from other guilds as long as their mains are in the guild". It's not like you were setting a good example to begin with, you're merely making stuff up as you go along while trying to benefit your own interests.
This thread was meant to be objective and on point with the history logs of Rated Battlegrounds on Neltharion, and as such there should be open and clear rules for every team to abide by. And so; I suggest that both the games between Fatality and Criminals Club aswell as the games between Fatality and Anarchy Inc are negated due to rule breaking.
The games prior to these have had no dispute regarding rule breaking, but these most recent ones should not be counted as "guild games".