When moving nested tags into another tag structure, the nested-ness is not preserved. The moved tags, as well as the nested tags will be put on the same level in the new structure.

Example:

Tag structure before:

Cities

-New York

--Bronx

--Manhattan

-Detroit

--West Side

--East Side

Tag Structure after:

Cities

-a-m

--Detroit

--West Side

--East Side

-n-z

--New York

--Bronx

--Manhattan