Ability to move tracks to different categories

When I originally set up my account I put the material into 2 categories, instrumentals and vocals. Over the last couple of days I uploaded a couple of instrumentals which I did while on the ‘instrumentals’ page but, even though the tracks are visible from the main page, they do not appear in the instrumentals section. Has the interface changed or have I just forgotten how to move files around?
Thanks for any help/suggestions.

EDIT: Just stumbled upon the solution. I clicked on the category link and then saw ‘edit’ next to my name. At first I thought it was to edit only my name for the category but when I clicked the link I saw more info on adding recent tracks to that set list.
I was going to just delete this post but someone else might have this same question.