Yeah, that is true, but what is confusing me is why the noise type AFC’s are different from the rest.
its not precise but it means you can scale yourstuff out better for all types of particle lifes.
If I left it at the default 100 I could take it as 100 percent, but I want it precise so I specify 300 frames as my particle life. That’s why it’s bothering me that those 4 AFC’s at the bottom don’t listen to me. 
Here’s some images from my scene as an example:
My animation is 300 frames long, and I’ve set the particles to be deleted after 300 frames:

I set the particle life in Afterburn to be 300 frames so the AFC’s will be correct, well most of them. :):

Here’s a good AFC. The values are where you would expect them and the length is correct:

But here’s the bad ones at the bottom for noise type. The arbitrary value 1.10 makes absolutely no sense, and why does it go to 100 when I specified 300? If I had wanted it to go to 100 I would have left it at the default. :):
