breaks and break lines whats going on and how do i fix it

most likely thats the flexible rubber brake hose gone bad.its about a foot long and goes from the steel line to the caliper.the inner lining collapses and doesnt allow the fluid to escape the caliper and the next time you hit the brakes theres allready more fluid in that side then the other causing it to brake harder on that side.

OK you say that you have new BRAKE pads and calipers , the problem is that you most likely have a clogged brake hose. This is why it is pulling to one side , the can past through and one wheel has pressure and the other one doesnt . I would advise replacing both.