Sport mode is Mode2
Its pretty well done from factory. IMO having the valves closed at low/mid RPM and partial throttle gives you a little more torque. I don't have a dyno chart to prove it but my butt dyno feels it.
6th gear under 50% Throttle and 2000rpm, seems more like a highway cruise than anything else. No need to have the valves open.
7-10 will always have them open at 100% throttle. But you will never use those gears while racing.
Any gear over 4500rpm is always open.