Cinnamon can be found under 'Herbs'. Perhaps you expected it to be under 'Flavors'?

Yes, exactly.

Cinnamon is actually bark, not an Herb.

You're right. Cinnamon, ginger and licorice are spices, not herbs. Perhaps the category could be renamed 'Spices & Herbs'. Also, grape, goji and grapefruit are neither, they should be placed in the 'Flavors' category, or in a separate 'Fruit' category.