Contact Categories do not show on Folder List

Why do two of my contact categories not show in the folder list on the left hand side of the Contacts page.? I have about 12 categories and the other 10 all show up fine. I have contacts assigned to the missing categories, and those all show in my list of contacts when none of the individual categories are filtered, but obviously I can’t filter on these two categories as they don’t show in the folder list. The two offending categories do appear OK under Tools/Categories in the Contacts tab, so they appear to be set up properly.

Hi Richard,
can you take a screenshot of how the contacts are displayed in the folder list? Could it be that you just need to scroll further to see them?

Best regards,