re: Need some advice on training my lab

When you say he avoided the place then you nicked him you are not reinforcing your are attempting to punish for what you see as a refusal. You then double down on the collar and give a continuous shock until he sometimes goes to the place you want and sometimes he doesn’t go. You are opposite in your thinking of what collar conditioning is. I am not watching your dog obviously but what you describe is confusion on your dog’s part. Introducing collar pressure when a dog is confused is a recipe for disaster