In Eden Normal, you can get 1 piece of gear loot from each fight each week. So by rolling on the bangle and winning, you invalidated your 99 on the belt. It's based on which item has all the rolls completed for it first, so all 8 people did their rolls on the bangle before the belt had all 8 rolls in.

If you're fine with whatever, then just roll on everything + win what you get, otherwise you need to look up which pieces you need from each fight + roll for those and then pass on the others so that you don't accidentally win them, and then do the fights again until you get what you want.

Eden Savage works differently, you can roll for everything + win everything if you're lucky. But you can't re-do a fight for another attempt at gear, you have to wait a week.