If you further edit version 2.2, and publish your changes, a new published version is created, but:

1) the private versions still are around, they should disappear
2) the published version shows as a descendent of 2.1 (not even of 2.2!), when it should be placed as a descendant of 2.0

1) Go to the versions screen of an LO
2) Select a version. For illustratio purposes, let's call it 2.0
3) Click on the edit tab
4) Enter or delete some text, then click on the "Save" button

--> the system creates a new private version, called 2.1, which is displayed as a sibling and not as a descendant of 2.0