"the A major chord often plays low (like first position on the fretboard, sometimes higher (like in second position)."
Try in your Song Setting "Avoid Transpositions in RealTracks"

You can do it in realband with multiriffs then import into band in a box.
http://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=343721#Post343721