Pariah Exonar

I set my display name yesterday using a few of those fancy characters everyone likes to use. It wasn't a problem for my system becayse i was able to see the characters instead of those error boxes. It set for all of maybe 30 minutes, then i relogged. Once I came back inworld, my display name was reset to my SL username. When i went to check to see if there was soem sort of glitch, or a rollback to my account, the display name function shows that I can't reset my Display name until next week. Why would my display name be set to default when i clearly did not set it to default? What woudl cause it to reset to Username without me actually pressing the reset button? on My web profiles it shows this that 18 hours ago.. i set my display name to ' ' . And then it shows that "about a minute ago" i changed my display name to "Pariah Exonar". I did not do this.. why is this happening?