The problem here is he didn't do this quest THROUGH Sunny Smiles, he ended her tutorial after the killing of the geckos. As a result after speaking to her again he could not resume the tutorial, the dialog options were not there. I told him nevermind that maybe he can still do it, or at least I can show him where to go to get the plants and make the powder. So I sent him both behind the schoolhouse and up to the graveyard and the plants were not there!
So we just kind of shrugged and said "oh well I guess you missed out on that quest no biggie". I said well, I'm sure you can still use the campfire, it's not like the quest would stop that. Which was right - he found the 2 ingredients for healing powder somewhere else, went to the campfire to make it. After he made it text appeared across the screen indicating that he just gained the quest "By A Campfire on the trail". The objective telling you to collect the ingredients and make the powder showed up, and then checked itself off because he had just done it.
So again, the quest didn't end. It's still active although completed and he can't get the EXP.
Anyone else have this happen?