Pinterest event codes

Hello! I have been having trouble with my code injection for Pinterest. I think I have the base code right by placing it in the header on my websites code injection. But as far as event codes, I am confused about where to place them. Right now I have them placed on each page I want them on. So for my products page I copied and pasted the manually added event codes for checkout, page view, and add to cart. I am specifically struggling with the checkout and add to cart event codes. My Pinterest tag helper says everything is good but then Pinterest is saying my tag health is low and something is wrong. Has anybody had this problem and can help??