This is one of the issues as an admin team we have been trying to sort. Our understanding and communication has lacked throughout the admin team in the past and we have been doing our best to fix it.. people have made bans and not posted.. ban files have become corrupt, people who have had infractions are still playing etc. etc.
Honestly if the admin team had known that a player had a PB Ban when they applied to join XI they would never have been allowed in and also due to the issues iv stated - if an admin had looked into the post you pointed out a while back and we had the knowledge we do now you would have been removed from XI then, also if we had had this knowledge when the servers were first created then we would never of had PB banned players in the clan in the first place.
We as an admin team are trying to organise and improve our systems, one of those is the PB system that yes we have always ran on Ftag2 however most likely had some issues with the ban file which has allowed some people to play when they shouldnt have been allowed. As our communication and organisation improves it is causing people who had bans but were still playing to be blocked.. all i can say is sorry but its whats happening.
The admin team isn't perfect however this is one of many attempts at keeping the servers clear of hackers and fun to play on for the legit players. Sorry for any inconvience caused however in my opinion this issue is closed, you know whats happend and you know what to do to get back in.