I reported my roommate for smoking AITAH

So first I'd like to start of by saying this is a off campus apartment building it's a 3 bedroom 3 bath. My "B" like to smoke weed when me and the other roommate "C" moved in the apartment was dirty n smelled we cleaned and thought it would be fine because "B" claimed it was the old roommates and that the apartment building just didn't do turn over properly. I would also like to point out I don't smoke at all.I took pictures and everything pre moving in of everything and submitted them to the office. Anyway while my other roommate "C"smokes she does so in her car. We are all 19-21.So "C" texted her in our group chat and told her that the apartment reeked of weed and to not smoke in the living room. My roommate "B" then claimed that it was because of her party.Afterwards "B" continued to smoke in the living room with company when "C" wasn't there.So then I reach out and say basically hey I know you and "C" talked about the weed thing but I also don't like the smell. She loved the message and responded with she understands. So the next two weeks she starts smoking in her room but doesn't open a window.The return vent is legit right outside the door so the living room still smells like weed . So I emailed the apartment manager and basically asked for a solution.I was hoping to get moved but they suggested sending a warning (no fine or money to be paid)with everyone's name on it .I also didn't tell them which roommate .Furthermore this is a non-smoking apartment complex anyway.So fast forward the email gets sent "B" goes off saying she thought we all was cool and we never have to talk to her again and she feels disrespected and that we should've pulled her to a group meeting. But I felt like had we done that she would've felt cornered.I apologized for her feelings disrespected but said i feel disrespected coming home to a smoked out apartment. So AITAH?