Hey guys. I just started climbing a few days ago. I have experience with a chainsaw and own a helmet and chaps. I do not have "logging" boots just normal high top work/hunting boots. I bought two steel flip ropes with prusiks, a weaver saddle, and a set of Buckingham climbing spurs. So far I have only used them to go about 20 feet up in the tree. I have tried a 12" DBH Walnut, a 16" DBH Hickory, and a 15" DBH pine to get more comfortable climbing. All three where straight with no limbs. My problem is I keep having issues with that shanks of the spurs wanting to slip off the backs of my legs. I am not sure if maybe I have them on wrong or I am using the wrong form but either way this is killing my knees and shins to use them. Can you guys give me some advice on why the shanks want to move to the back of my calfs or any other tips on climbing with spurs? I have a removal job coming up that is why I purchased them. I included a picture.Thanks