yes, turn it off as a rule, until you're accustomed to it. one way of thinking about it is that it's the inverse of how the actual human musculo-skeletal system moves. Instead of the brain ordering the rotator cuff to move the shoulder, which then moves the humerus, which then moves the radius/ulna to allow the hand to reach up to an apple in a tree, IK sets it so you just drag the hand up to the apple in the tree, and all those other joints automatically move along, sometimes with extremely wacky results.