Unflirty Sim being read as Romantic

It's exactly what it sounds like. I have a Sim who is Unflirty. Every so often he will get the emotion buff "Tense +1: Lovelorn (from Romantic trait)/ Romantic Sims need to show love and have it shown to them!"

He's not Romantic, he's the exact opposite. I've done everything: Turned mods completely off, removed and readded the trait, cleared the cache, even deleted and reinstalled the game (saving the tray files of course). He still gets this buff. It's very annoying to deal with. Anyone have any other fix ideas or is he stuck like this?

(Also very sorry for the tag but it forced me to tag before posting)