DIV CLASS not working…sometimes

I have a page with some paypal buttons set up.

https://www.elephanteater.com/wordpress/comics

Things are working dandy until you get about 1/3 down the page. “Original Artwork” and “Not from Around these Parts” are both having issues displaying the paypal buttons properly. There is an ugly white border around the buttons that should not be there.

The two products that are having this issue are the two new ones I just added. However, I’ve tried to make the code EXACTLY like the functional ones, but it still displays those wacky white borders.

Someone helped me to set up a div class to make that not happen, but to be honest, I’m not really sure how it works (obviously) or why it has stopped working in the case of my new paypal buttons.

Thanks so much for any help you can give me.

Sincerely,

Ryan