Chord edit in engrave mode

I have problem with the chord editor in engrave mode. First of all are the accidentals too small and when I try to fix it in the editor suddenly the transpose of the cords are wrong in the parts. When I delete the chords in the editor transpose go back to normal. This editor is very hard to understand and why has the chord so small accidentals? Could it not be a standard size that works fine.

Have you perhaps inadvertently adjusted the size of the ‘Chord symbols music text font’ font style in Library > Font Styles, or chosen the wrong font? By default it should use the Bravura Text font (note: not “Bravura”, but “Bravura Text”), at 11pt.