We have chatted a couple of years ago (great work!!), and I'm back on inputting new family members as my father's generations goes back to first white settlers in Australia.
In the case of '13 sets of possible matches'. I would firstly assume these are NEW people, but wikitree (somehow?) generates a report showing each new profile with a "possible match FLAG", where user clicks to goes into more pages, where you hi-light the reason(s) for the match, and then you have 3 click choices: (1) Add new profile, (2) Merge with existing profile OR (3) Delete the profile...