If it was set up to be "authentic", as you say, the hi hat should always be on the red, as on a real kit you should be crossing your arms to play it. Like FairwoodStudios said, most drummers play cross handed and the hi hat is to the left, including myself. My guess, is you like how the hi hat is slightly off to the right of the snare and raised up a bit in the Guitar Hero set. Right? That's still wrong, as the snare should actually be in the middle, and not the left side. When Rock Band switches the hi hat notes in songs like Everlong, it's actually more accurate, whether you like it or not.