Hi Jean, when I added the {{Unsourced|East Lothian|Midlothian}} category, it added the profile to the unsourced categories for both East Lothian and Midlothian. I'm also a sourcerer (adding sources to unsourced profiles) and I concentrate on Scotland. So the next time I'm in the mood for sourcing, I (or anyone else) working on unsourced profiles in either East Lothian or Midlothian could find John Nisbet's profile easily to add any sources needed.
I don't use many other location profiles myself, but a lot of people add location categories for significant events in their ancestors' lives. If you want to use location categories this way, check the Scotland project pages to find the correct formatting for people who came from either East Lothian or Midlothian (it might help with the Nisbet one-name study, depending on how it's organised). If you don't want to use the location categories then you can just delete the whole {{.............}} line.