Please upgrade to 2.1.x here.
The 2.0 branch is no longer being updated.
Current version is 2.1.11
, released 12 June.
[Tagging Enhanced Addon] Logic problems then deleting tags
If you delete tags from dashboard you still have them in database for each post, that results in tags still present during post editing in tag line.
Plugin must implement filtering of data before presenting them to editor.