That happens to me sometimes. Did you make sure to click 'Wear Outfit'? That's the only way you can wear them. Saving the outfit will just save it to the three choices you can make. xD

But yes, it is très frustrating.

Edit#1: Lulz. Read your first post again, and saw that you did click 'Wear Outfit'. Well, not sure what to tell you. Just try again, I guess. o ^o;