inverse kinematics and broken parts

Okay, so i’m very new to Toon boom, i am using toon boom animate pro 2. My question is how to make arm(or other body parts) not to break during inverse kinematics, if i want to make it move smoothly and nice like in family guy or simpsons. Here is my problem cuz i suck on telling my point: // i tried making colorful parts and with round endings, but still can’t get right result - please help me, how to do it!
my try with colored version - a little better but still black lineart are on top of drawing.
p.s. And i don’t know why when i re editing pivot points they don’t listen to me O.o i press to one place and they just going farrer and farrer.

I think you should check this:

Check this quicktips about pivots: