I know HOW to calibrate the touchscreen. One of the problems is, that this calibration doesn´t help me

If you open your browser, switch to a full screen modus and tap and hold your stylus near the upper left corner - the you see if your stylus is exactly in the middle of the ring.

I just want to know - is it normal, that the stylus is always not in the middle of the ring?

And the second question was about tapping on the onscreen keyboard - anybody the same problem, like tapping an "x" and getting "p" instead? Not often, just sometimes... Seams like the digitizer is not correctly responding...