I'm using 3.3.0 and started playing with the tags. I've noticed that all of the tags recently created have the Joomla tag as their parent. When I edit the tag, the Parent pull down menu is set to None; however if I Unpublish the Joomla tag, then the subsequent tags get unpublished as well (and cannot be published until I publish the Joomla tag). Is this expected behavior?
Some screen shots
Components => Tags
I've unpublished the tag Joomla which also unpublishes most of my other tags (oddly, not the Baking, although that one was added at a different time than the others, leading me to believe that something has changed in the meantime). If I click on the status of SciLab, it will not change. If I toggle the status of Joomla, all (save for Baking) follow suit.
Components => Tags => SciLab
No parent is set. Here I can publish the tag, and it seems to persist until I toggle the Joomla tag; Joomla is still behaving like the parent.
Components => Tags => Baking
Why baking isn't sharing the fate of all my other tags is beyond me.
In response to answer by @FFrewin
Here is a screenshot of my jos_tags table. It looks as if there are problems with the lft/rgt values. Additionally, the Path shows that Joomla is the parent of all the tags, even though Baking is not behaving as if it has a parent.