Most likely just a mistake, which if you tag PMJ like this:
@PMJ I'm sure he'll correct it.
That's assuming you weren't banned, didn't post enough in prior months, or something else to warrant exclusion from a tournament. I'm not involved with the tournament leadership and am just helping you out by tagging
@PMJ so that this sticks out for him to see. (Not sure how much not posting enough would matter, but they do want the tournament players to be involved in the community outside of only the tournament and it is a question on the sign up so it's possibly something)