This is due to the poor choice on our part to use “admin” differently for traditional projects and collection/umbrella projects. The “Projects you admin” section only shows traditional projects of which you are the admin.
I’ll make an issue this week to make the nomenclature a more understandable.
Ah, that makes sense. Let me know if I should delete the post since it’s not really a bug (or obviously feel free to delete it yourself). Thanks for clarifying, and for all the work you do to make iNaturalist a valuable resource!