I have a BIAB song using Real Drums. All part markers are blue (a). When I set chorus count to three, then when it plays the second chorus, the drum pattern changes. The real drums style only lists a and b options without any groove variations. The drum pattern in chorus 2 does not match (b). Where does this alternate (a) pattern come from in chorus 2? More importantly, how can I get it to play in chorus 1?