Bump on an old thread
I'm having the same problem. My game is not as modded as some of the others in this thread but it's still not close to vanilla + SS2. I've managed to set Aiden as the head of security and everything else is proceeding fine but he's still following me. Would his behavior become corrected if I get security up and running with patrols?
EDIT:
The above-mentioned console command to dismiss aiden as a follower did not work, because he's not loaded as a follower.
Using companion framework's "dismiss ineligible followers" command in the tape does not work.
Loaded an older save file from a few hours back before I liberated Vault 81 from a gunner attack. Aiden began following me around after the quest ended. Maybe check the scripting involved with that quest as well as liberating GNN. Additional bug: If you don't talk to the gunner leader in the overseer's room the quest breaks and gets stuck on mansfield handing you the radio but not proceeding.
EDIT 2:
Using Amazing Follower Tweaks, I was able to assign aiden as a proper follower (follow only, do not manage), then dismissed him from my party. Message displayed said "Aiden is going to GNN", Aiden at GNN has the proper department head dialogue prompts, but for some reason I can't call him on HQ radio. Though I wasn't able to call him before I assigned him as a proper follower using AFT. Temp fix unless this breaks many things in Chapter 3.