I have 2 questions. I have been able to copy and paste the buy now button when adding new product but I need to change the link for some new product that ships differently. How can I add a new buy now button and how do I set the link when it is pressed?

Also I have some images showing up only on some selected products below the prev/next button on the bottom of the product page. How do I remove them? They all seem to be set up the same but some have extra images of other products there.