Thoughts on MIDI program change start value

I've just got my KPA, so far I love it. I've been sending program changes from Pro Tools to change presets automatically. Lots of fun. I notice that the KPA PC numbers start at 1 not 0 resulting in having to set every value in Pro Tools one value lower. I thought that MIDI values should start at 0 and if you hit 128 then you need another bit.