So if there was an Upstate Liberty they could make up a story of how the old map had gone so they created Liberty City again. So basically for example America go to war and Liberty City is bombed (just an idea)
Heh, I think now we are on the same page except about the bombing of L.C. Well the old map is all that new it's just redesigned a bit and looks more modern. That happens in real life too; as the years go by, buildings and people change. It's just logic.
I know, I agree with you however the amount of change that has happened how will R* explain all of this in the new stroyline in GTAIV