Yeah. Working on a post. I kinda have to touch base with a lot of things due to Aro's circumstances, haha.

I'll go with it being a clerical error, and Phoenix's character was called back home to his village, or something, and then have the high-ups in the village think it to be a good idea to put Aro with a fresh squad, so they can safely evaluate his skills, as opposed to restoring him to Chunnin rank.