Hidden redirect somewhere

I am implementing Pro Sites and I afraid I will spam this forum with tons of questions First question;

When naming plans (Pro Sites / Settings / "Rebrand Pro Sites", I by accident called it "Pro Site" at first. Also, at that time I had a normal Wordpress page called "/supporter". I Realized I wanted "/supporter" as url for my Pro Site, and information about this level should be at "/supporter-info" (a normal Wordpress page).

The problem is now, when I kill checkout page (and empty trash), hit save so the page "/supporter" gets created by Pro Sites, I can see it being created, problem is when I load that url i get redirected to /supporter-info - my static information page... What on earth could cause this behavior?