Why did my migration plan add channels I did not paste?

When Podspun reads your existing website for a migration, it also reads the links on it. A YouTube channel, an Apple Podcasts show, a TikTok profile, or an Instagram profile the site links to is opened the same way a pasted channel is and added to the plan already ticked, as a chip at the top of the plan page. Each one says "found on your site", and the site is built with it.

To take one off the site, open the site in Website Builder, then Site Settings, and turn it off under Podcasts/Episodes (or Social, for TikTok and Instagram).