Hello Amanda!
It’s definitely possible to add tags, but it can be a little tricky as you have found. I apologize for the lack of clarity, tutorials, and functionality. Will work on that! In the meantime, you can only add and remove tags that are included in the active drawing set. So in order to remove the tag, you may need to add it back in, select all, then untag.
I have a script that can remove all ConDoc Tags applied to a model. This might be faster than trying to untag.
Moving forward, it’s always best to work out your drawing set first, then start tagging. If you are adding tags on the fly be sure to get the naming right.
Feel free to set up a discovery call and we can discuss or just give me a shout. I will be back in the office tomorrow (tues). 7204433242