at the top of your viewer window is the name of your parcel. clik it to open up your "about land" console.
on the first page is some info boxes - then one that says set...open that up and set the land to group (your land group)
now open the 4th page - options.
see where it says create objects..unclik the all residents and clik the group box
same with object entry
same with run scripts
now pick up the buoy and re-rez it
on the first page ofthe edit window - open the set option and set to your land group
now scroll down and clik the share with group...
it may take a few times of opening closing buoy and about land window to get things to change