I usually check my feat tab often to see what i can do to earn more. Today I checked my style tab ( habbit, have mostly everything ) and noticed the Aerial Defender style showed up. As far as i'm aware the chest i need to complete the style is Heal/Controller only. Did something change? If so where can i find the Aerial Defender Tank Chest at? Same location? My styles also went from 165/170 to 165/171.
I was under the impression that was actually a healer style. I have some pieces waiting in my bank as we speak.
Maybe you collected some pieces from lockboxes or something? Perhaps once you got a piece from episodes 21-23 it made the feat show up in your list and counted all the lockbox styles you had already collected.