Hi,
Thanks for jumping into this. I tried to replicate your solution, but even after saving and re-saving as you described, the custom sidebars don’t appear.
I believe since WP automatically sorts the categories alphabetically, the plugin is seeing the first category as unassigned and skipping the rest.
In this example, where the custom sidebar is assigned to CUBA:
https://www.cctv-america.com/2016/05/05/cruise-ship-adonia-arrives-at-2nd-port-in-cuba-cienfuegos
The categories are: CCTV NEWS, CUBA, LATIN AMERICA
Here:
https://www.cctv-america.com/2016/04/14/cubas-seventh-communist-party-congress-begins-saturday
The categories are: CUBA, GLOBAL BUSINESS
I have found when the assigned category (CUBA) is first alphabetically, it appears just fine.
Let us know what your developer thinks and what you may need for us.
Really appreciate your attention.