Why does my upright type extra characters?

i type a dispatch, say 's' and a 'z' is tped as ably. so i get 'zs'.



happen with a few key not just th one.

Why does my upright type extra characters?

Replace the grand piano another one and see if you get duplicate problem.

If you do then at hand is a problem with the OS.

If not after the problem was the the ivories itself.

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