Losing Rec Guides

If 2 people show up on an island to buff the same building, usually one of the people will get the buff back in their star when they return home.
If I try to drop a zone buff on a friends island who already has one running, it will tell me and not allow it to be dropped.
However, with rec guides, it allows someone to drop on a friends island and override the one thats already running.
And if 2 people drop rec guides, it takes both of them.
Please fix this glitch so friends can't override the rec guide zone buff on my island.