The problem arises because you had the “Plant trees” tag selected in TiddlyTools/Search/Tags when you deleted that tag. Because the currently selected tags are stored in $:/config/TiddlyTools/FindTags (as @Scott_Sauyet has noted), “Plant trees” was still being used when generating the resulting lists of tiddlers.
This problem was further compounded by an “error of omission” in my TiddlyTools/Search/Tags code, which was only showing checkboxes for tags that currently exist in your TiddlyWiki. Thus, while “Plant trees” was selected, it didn’t appear in the list of tags, so you were unable to de-select it AFTER having deleted the tag.
Fortunately, the fix for this was easy: my code now shows checkboxes for all tags that currently exist PLUS any tags that are currently selected, regardless of whether or not they exist in your file. This allows you to easily de-select the obsolete tag. Note that as soon as you do, it’s checkbox will also disappear from the list of tags, since it isn’t being used anymore.
As a bonus, as long as I was changing the TiddlyTools/Search/Tags code, I’ve added an extra option: you can now toggle a checkbox setting to include or exclude all shadows from the list of tags and the resulting lists of tiddlers. The default is to list only tiddlers, while the old code always included both tiddlers and shadows.
Note: I’ve also made a minor style adjustment to show 3 columns instead of 4. This allows for better display by avoiding most instances of word-wrapping when long tag names or tiddler titles are shown.
You can get the latest update here: TiddlyTools/Search/Tags.
Just view that tiddler and drag-and-drop its title into your TiddlyWiki to import it.
enjoy,
-e
