this is a wild guess, but it probably has something to do with how the rollers and bearings are positioned for the trackball. if you beat the hell out of your trackball by playing Golden Tee, you'll probably definitely want to follow the arrows.
Isugoat, if you are talking about the rattle caused just by the rotate, I seriously doubt it. A 90 degree clockwise rotation of a happs TB still has a roller on the bottom, but the other sensor roller is on the left instead of the right. Basically the same as default, but in mirror horizontally.
Now, all trackballs have a "weakest axis" where rattling, if any, probably would occur. The direction is the same as the idler roller (non-sensored roller), or the hypotenuse between the rollers with sensors on it. On happs, wico, and betson normally mounted trackballs, this is like "/" (45 degrees right from vertical). On StingMe's tb, however, it would be "\" (45 degrees left). StingMe, is this the direction you hit the ball when you get the rattling? If so, you would get the same rattle but in mirror if you had mounted it as they suggest. You might try tilting the control panel a little more (for a total ~15-20 degrees max) and see if this helps your happs trackball. (Just rest the back on a book or something to test it, I don't think it will help very much, but it might.)