extra letter when typing msgs

[aznd000d]

When I hit "b" and "a" together on the keyboard, the screen displays "bla".

So when I'm trying to type "bad", it displays "blad"

Another example is "b" and "e", it sometimes become "ble" or "bel"

There are a few other too but I forgot.

Anyone know what's giong on?
I'm running the kitchen ROM 5060.

Oh also, it's been doing this as long as I can remember.