Log-In Error

Last night, when I tried logging into the client it said my UN/PW was incorrect (it was not). After multiple times I decided to just change the password and that let me into the game. This morning I tried logging into the website and it wouldn't accept my password! I checked the client and I could log on there just fine. I changed the password again and it let me log in here (Not sure about the client because I'm not home right now)

Has anyone else experienced something like this?