Most of the skins that haven't been updated since the Free-to-Play went live last autumm are out-dated and have some glitches on them.
Also some skins require you to relog to the game after you have selected the skin for the first time. Authors should mention this in their skin's user guide.
Wow! Relogging worked fine! I never thought of that. There should be a FAQ for that, or at least, as you said, noted in the user guides. Thank you so much!