Rerolling Charms

[Animation]

All,

OK why is it that shimmering on a small charm can only appear (on 3 perfects plus magic re-roll) if the monster dropping it is level 47, even tho the affix is a level 33 affix? And yet for a grand charm with +1 skills, I can re-roll it with the monster dropping it is level 50, even tho the affix level is also 50? Whats up with that?

Also, that page (linked above) that does the affix calculation shows that a GC can only have 12% resist all, but I'm sure I've seen a 14% resist all GC.

Lewis