After I meld an item, it goes back to the materia menu with nothing listed to meld, so I have to back out into the left column, which resets the position to the very top so I have to scroll all the way down to the item I want to meld to meld it again. I'm not sure if this is an oversight or if it was just designed this way (it seems like it was supposed to go back to the materia meld screen with the right column filled up, but that's not what it is doing right now), but it's a big bother.

Furthermore, occasionally if you go through the menu too quickly and don't allow your character to sit down fully, the materia meld won't go through, it will exit all your menus, and then you won't be able to select the option again until you do something like switch your job or perform an action.