But it does not matter whether the are already included or manually added
It does matter. See, if you add them automatically, their ID's are automatically set as well (usually with a long number such as 405678), while if you add them one at a time, the first location will have ID = 1, the second ID = 2 and so on. Then it would be a matter to get them not by Name (alphabetical order) but by ID (order in what they were added to the database). Also, this would benefit final URL's format, they would be shorter (http://yoursite.com/islamabad-r1
instead of, for instance, http://yoursite.com/islamabad-r405678
So, again, there is at least some locations you added automatically or all of them were added manually?