The top of the shoes have a semi-circular part that fits around the anchor bolt. There's a possibility either the shoes are worn or the anchor bolt is worn. Normally, the shoes wouldn't ride up over the anchor bolt. I would check the shoes to be sure they aren't worn or the anchor bolt isn't worn. See the attached pic
The springs may actually be too weak, because they should pull the shoes back toward the anchor bolt after they've been expanded by the wheel cylinder.
My shoes are relatively new but I will inspect anchor bolt to be sure it's still serviceable. Thanks.
