Why can I only choose from six of the twenty-odd categories to put my question in?

sounds like a glitch?

i'd say take a screen cap of what is displayed when you select browse categories and get YA to verify it for you. they are all there when I ask a question.

as for the suggestions, I believe that is based on an algorithm which looks at keywords and identifies them in questions previously asked before identifying the category they were asked in. I decided this must be the case after seeing lots of question about protein synthesis pop up in the vegan/vego food section, where people often ask about protein intakes from vego foods. Plus anything with the word 'meat' in the question ends up there as well... *nice*

It's a conspiracy

A Yahoo answers Glitch is out to ruin the fun of inappropriate category choices