I thought I was creating just another storage location (Box 50), inside a room in one of my buildings (Frederick). But, instead, it looks like I created a new universe and put ALL of my buildings into it.
For example, the entry for another box (W-58) correctly shows it in building Frederick,

but the contents of Box W-58, it adds a new top level (Box 50) containing building Frederick.

The location in hierarchy shows all of my buildings, but not the root Box 50, except in the upper left:

Boxes in other buildings also have the buildings in the new root Box 50, too.
Any easy way to fix this?
Thanks in advance!!