I'm in the same boat, had my fruit beer moved to category 34 against my will. Worse still, it is a clean fermented beer with tartness only from the fruit.
There are no style guidelines published for this category, just the name "specialty sour and brett beers".
I had to dig pretty deep in the competition web site just to find out they even had this special category, sure didn't know about it up front.
I've seen it before where other competitions have a specialty IPA category or similar, in that case it was prominently noted that any specialty IPA's entered in 16E or 23 would be moved to the "Specialty IPA" category. I have no problem with that, as long as you know what you're getting into up front.