Hi Helex
I had a look on your files.
The csv file looks quite ok, how ever it shows that the phone was lying on the table all the time (angles almost 0) and X and Y almost 0 and Z almost 1000.

The Xterminal log I never really used for that kind of debuging (more for timing issues), so dont spend to much time with it.
All I do is to read the sensor 50 times and then take the average of it as smooting.

What is shown on your graph when you move and tilte your phone?
Can you add a screen shot?
I also would suggest to check with some other acceleration tools like libqacceltests to make sure every thing is correct in your phone.