Fast Cast Icon Appears For No Reason

[Sephiran]

Platform: Windows
ISP: Cox
Type of Internet Connection: WLAN
Internet Connection Speed: 15Mbps
Date & Time: July 4, 2014 20:30 EST
Frequency: Once and Ongoing
Character Name: Sephiran
Race: Hume M
World: Bahamut
Main Job: PLD99
Support Job: WHM49
Area and Coordinates: Eastern Adoulin (initial appearance)
Party or Solo: Solo
NPC Name: None
Monster Name: None
Steps: After leaving a Hurkan fight early because no one was using earth magic to get rid of the aura from Crashing Thunder, I logged off in Eastern Adoulin. Upon logging in the next day, I found a Fast Cast icon in my status area. I thought it was abnormal and so I removed it (clicked it). It came back shortly after. Even after zoning, it remains. I logged out for the night after placing a GM call; however, needing sleep, I had to log for the night. (If the GM that responded to the call is reading this, I'm sorry I stood you up.) Anyway, today I logged back in and I still apparently have Fast Cast.

Update: I did a Rieve, received the Fast Cast momentum bonus and upon successful completion on the Rieve, it wore off.