I Found a lot of double profiles today, from a gedcom. For example https://www.geni.com/people/Paavo/6000000090907831858
The other double profile is identical.https://www.geni.com/people/Paavo-Kyr%C3%B6l%C3%A4inen/6000000018578308037
But in this older profile it doesn´t even show that there is a tree match, so I don´t know that there are matches but the gedcom-importer does? It doesn´t make any sense.
And you really shouldn´t tell people to join geni using gedcom!