Hello Kim,
When you have completed the GEDCOMpare process, those profiles which you have not identified as an existing profile will have an ADD button. You will then click on the ADD button and only when you agree to 'CREATE PROFILE' will a new profile be created.
You can flag a profile but that has no meaningful point, it is just for your visual benefit - just to remind you not to click on the ADD button
Did you include yourself in the GEDCOM, make certain that you have identified yourself as an existing profile, it is then best to start on your parents, then grandparents, then great-grandparents, go back as far as you can in the GEDCOM, then fill out the siblings.