I recently had a small version of the "uncategorised" part of your problem.
I installed a new VST synth and then found it in Uncategorized. I wanted to move it to Synth, but my old method didn't work. I didn't want to set up a custom layout, because then I'd have to manually move every new VST into it.
So I closed CbB and opened Sonar. I moved the new VST to the Synth category and closed Sonar. Then I reopened CbB and saw that the new VST was in Synth, where I wanted it.