The sport button works normal on my car and I assume by “press it” you mean when i put the stock shifter into sequential mode?
Yes. You can play around with the modes and modify shift maps, but it will more or less be A or B determined by sport button any time it's shifting itself. D/DS doesn't make a diff. It MAY at some point, but I didn't mess with it enough before I put the M3 GWS.If I’m reading it correctly (I’ve not had a lot of luck lately) that’s exactly what I think happens .The gearbox is staying in the same shift mode until sport is pressed