Never mind. I had forgotten to link to the plugin css file.
What I found, through trial and error, was that if you put tags in a new post each word becomes a tag. However, if you go back into the post and use the add tag it is added as a single tag even if it is several words. In other words if you create a new topic and enter Santa Claus North Pole you will have those four words as tags. If you go back in to the topic after you’ve created it you can add Santa Claus, then add North Pole, and you will have two tags of two words each.
I know the answer is in the functions somewhere, but I just can’t quite find it. Perhaps I need to put this in the request forum.