Unfortunately we caught a lot people lately who didn't understand the rules well for buying tickets to their own matches. I've updated the rules in the help and added them to the terms of service.
You are not allowed to buy more than one ticket to your own match. There are many ways to do this, but it's all considered cheating. If you have an account you need to be logged in when buying tickets, this will prevent you from accidentally breaking the rules.
Friends who don't play Rocking Soccer can still help you by buying tickets when they are not logged in, but they too should only buy them once for each of your matches.
We'll be much more strict in enforcing this rule from now on. People doing this will lose fanclub members, repeated offenders will lose more per match than they can get so please play fair.