Nokia X6 :: Cursor Is Moving Automatically Composing Message?

I am currently on my 2nd X6 after the first one had a fault which made the cursor move by itself when composing a message (I always hold it at the regular portrait angle). It would also do the same with the delete button, sometimes I would press delete once, for example on a spelling error and the X6 would just carry on deleting, wiping out all of my message.So I have a new one and exactly the same is happening! The cursor flys around the screen, usually in the backwards direction, making a 30 second message turn into a 5 minute long nightmare. Im on o2, it is the 16 Gb model. Anyone know why it is doing this? I have taken the screen film off as I though that maybe that was interfering with the touch sensitivity, but it seems to be an internal error. It is infuriating losing a message, especially when I am on the move and can't use 2 hands to wrestle with this HAL-like behaviour The very fact I have had to sign in to this forum sums up how poor Nokia devices are.