unwanted scrollbars

I have a wordpress site at https://www.thelovequilt.com. if you go to one of the pages like, “donate”, there will either be annoying scrollbars on the bottom and the right of the white space where my content is, or there wont be any scrollbars and it cuts my content off on the right. why is this happening? i am not good at programming at all, so any help is greatly appreciated. this is so annoying.