Weird Keyboard Issues, help!

This just started happening today, when I press "I, O, K, L or . ," the letter next to it is typed in addition to the letter I pressed. So when I press I or O it types IO, for K or L it types KL. Now if I hold down one of the keys, say O, it will type IOOOOOOO. So If held down it functions normally but otherwise it doesn't. I tried a SMC as suggested in some other forum post but it didn't do anything. If you have any idea how to fix it I would be indebted to you forever. Its driving me nuts!
Oh! and its a late 2010 Air.

Thanks in advance!