I worked at a grocery store for 5 years and I had this store manager that managed like 2 or 3 stores at one time. He left to go on to become one of the higher ranks at the coroprate offices, I'm not sure which position he's holding right now, but they promoted him to a higher rank, obviously based on his hard working activities at the two or three stores.
Vampyrox, it is possible to manage more than one store at one time, as I have told you about this guy who was my store manager.
I interviewed this guy, who's the store manager of McDonalds, in Rochester and he told me that he is currently managing 6 different McDonalds at that time. He said it's very hard but once you get the hang of it, it's kinda easy.