Ok I finally got around to checking this out. The Vol-.L and Vol+.L don't change the long press behavior, and I ordered them correctly. I added ",null" to the long press and it causes the 1 sec. delay described, and then will continue increasing/decreasing the volume even if the button is released. Still does this at the original, slow rate though.
Out of curiosity, is there a difference between "Vol+" and "VolUp"? And how do I get the volume to increase in greater steps when changed from the knob?