Went back and read your original post again. All I can figure is you've got some bad line. Not sure I could set the hook hard enough to break 12 lb line in good condition. I use Berkley 14 lb mono alot and you can't hardly break it when you get hung. I just don't know. Dave Stewart is a good at the Carolina rig. Maybe you should ask him for a good line choice in Carolina rigging. Sorry I've caused you so much trouble, it's always worked for me.