Before I start trying to troubleshoot browser issues:
Can blogroll items be re-ordered? I see a handle that implies they can be dragged around, but it isn’t functional.
Is there a way to edit an item in an existing list?
Does it make sense to add someone’s Mastodon site as a blog if they don’t have a more traditional site? I don’t know what all the plumbing underneath does in Recommendations, and whether it matters.
Nope, that remains a mystery to me! Or maybe it’s for a future feature. It would be awesome if I could export my blogrolls to OPML with that description!
The “about” text isn’t currently used anywhere except that it’s available for plug-ins and themes to access. It’s not in the OPML either… I’m not sure what OPML field would be appropriate for it, but I can look into that.
For #3, I think adding someone’s Mastodon profile would be totally fine. Recommendations were designed so that you can put essentially any URL in there.