When adding different things under the edit places section. You can only at one item or remove one item at a time for it to save. If you select multiple layers it will only save the first one, or none. Not sure if it’s a bug or feature.
Sounds like a bug - you should be able to add multiple data.
I just checked, I can add multiple data, but if I delete, then add some other data, it doesn’t work, so there is a bug there. I’ll add this to my todo list.