some things work and some things do not, making a breakdown here:

Add/Update item works as intended when adding or updating a single item on one roster.

Remove item strips name from roster, but does not remove roster entry.

Add/Update Both seems to only work with one client (user) not admin client even with two way Subscription selected.

Remove from Both can ADD different names to roster, but does not remove entries from roster.

Client is unable to remove added rosters.

All changes to Rosters seem permanent.

I tried to replicate this issue, but for me it looks like all is working fine.

If there is still issue with how command works, I would say that Wojtek should check this command.

All functions work OK, closing issue.