So I'm replacing my springs and after getting under the car I see the end-links on the rear Whiteline sway-bar have snapped off. I don't think I really drive that aggressively enough to have put that much stress on the system to snap them but what else could have caused this? Does anyone know a fix to this?

The other side of the rear looks identical to the picture below.

Is the sway bar positioned right?

 

Looks to me like your bar is upside down.

Very easy to do, (I have Whitelines too) it looks like it's been hitting the body at the top of its travel. If it touches, its definitely in the wrong position.

S

 

yep, upside down, in this position it hits the frame rail bracket above the arm which is what broke the end link