1. I don't know and will have to research that or send it up the chain...
2. The Magment is to change the degree of "time line" snap you want your "cue/effect" changes to have. No magnet lets you move the size or position of your cue or effect freely on the time line; the two magnet settings let you go from moving the cue/effect with small segments of a second to half second segments of movement... If that makes sense.