Hi Debbie, I spoke to the developer about this. The issue dates back to earlier versions of WP /Tagalong and what changed, WP had a bug sometime ago and “fixed” their core architecture 4.3.03 or later…which had a major effect on Tagalong. If you updated WP from earlier version and had older version of Tagalong, you would see issues
To resolve (if that is the situation) see:
Under the Advanced Topics there is a better explanation about the whole configuration, what happened , WP assignment, and taxonomy. The new Tagalong installed with the newer WP versions work well together. I do not know of a work around other than to follow the suggestions under Advanced Topics, If you find anything let us know and we will update our docs.