That's all right, Sheila. You could merge place names even if you had more than one project but it is tricky.
If you are busy, don't worry about what Myrnice said. I think he was a UFT to TMG beta tester but the latest TMG word is don't bother to merge in UFT and don't bother to be sure your places are in the correct slot. You can easily do both of those chores in a few months after you have practiced with TMG.
That is, unless you put things like put the names of cemeteries in the town/city slot.