This sounds like an issue I had as well roughly 21 days ago. I also couldn’t figure it out at first days and then support said to me I have to do migration from
travis-ci.org (which I did and I had a bad time for many days afterwards fearing my project go bonkers - I should have informed myself more before click).
One left in the aftermath of it is that now there are way too many github repositories in my
travis-ci.com account. Did you figure out how to reduce the list to one, maybe two selected repositories? If so, I would love to hear about that.