i have an app that i updated in the app store. It has fully updated. But the app store is showing there is still an update to be done. In the update section the app i updated is still there its just shaded out compared to new app updates. I cant do anything to it either.
The MAS can see apps from other volumes and drives. Do you have a backup drive connected to your Mac that has the older versioon of the app? If so, that is why the MAS is showing that the app can still be updated.