have you ever had gps tracks shifted by several tens of meters? I tried the different modes of gps reception settings… same… strange!

This won't help you, but it seems very strange. One of the things I like the most with the 1040 is that you can almost see every little change of direction caused by potholes etc ..... Years ago back in the EDGE 305 days, there where often some generel misplacements of the tracks. in one direction.
If its hard or software is hard to tell, but not at general software problem, mine is spot on.