Hey, I don’t know how ghost rules work in The Conners, though I’d wager the show wouldn’t try and set out to make Roseanne Conner look bad regardless of how things shook out between the cast and Roseanne Barr.
The paint can thing was certainly crazy, and provided it was actually Roseanne, perhaps Dan got the wrong message from her.
Maybe Roseanne was trying to say she had a change of heart, or maybe even trying to stop Dan from seeing Louise later that day and witnessing her locking lips with that random dude.