Hi John!
Good question, thanks! When you upload a GEDCOM to WikiTree, you'll get a GEDmatches report which you'll then need to review. Part of that is reviewing the Suggested Matches. Our GEDmatch system looks for potential duplicates between your file and profiles that are already in WikiTree. It should find the few records you have already added and suggest them as matches. (If you inputted the data today, the system won't recognize those profiles exist until it updates tonight.)
You then have one of two options. You can mark them as a Match, in which case a new profile for those individuals would not be created. Or you can mark them as a Match and then uncheck the "Skip" box. What that does is creates a profile for the individual but then automatically sets it as an Unmerged Match with the profile already in WikiTree so you can then merge them together. I'd suggest the second option if you have a lot more information in your GEDCOM than what you've already added to WikiTree. Note though, you can only do that a handful of times in one GEDCOM import (10 times).
Does that help?
