Hansruedi,

This is not a design flaw. Within the pattern, you have 2 modes (CLOSE: Where the SD1 determines the appropriate chord following the harmonic rules of music, and PARALLEL: Where the SD1 basically transposes the chords based on what you play). What you want to do is set the mode to PARELLEL. Is is set to CLOSE by default. This can be done within the PATTERN EDIT menu.
Thanks.
AJ