Almost: Yin is the crazy, brutal bitch, slinging fire around. Yang is her laid back brother with skills around Manipulation and Health
You might guess who of those two is carrying the main load of their buff spells

Which incidentally is also the reason for the relatively high defense stats in the matrix: LOG and WIL are rather high with those two.
Regarding resistance roll:
You are actually right. I misremembered Net Bind as an environmental spell (that has no resistance). It's actually just a physical spell. So not only can you use a complex action to break free vs. 2xForce, you are also entitled to a reflexive STR+BOD check vs. the 5 successes of the original spellcasting.
Sorry, that's what I get for posting at work without access to my books.
So everyone who got 5 successes at their check still has their complex action.