This seems like a pretty common issue that started after last week's maintenance.
No official response from SE that I know of.
You may want to browse through the following threads:

http://forum.square-enix.com/ffxiv/t...rted-10hrs-ago.
http://forum.square-enix.com/ffxiv/t...early-undoable
http://forum.square-enix.com/ffxiv/t...Lag-90K-etc%29