Explanation for the big space on my page

I don't know what just happened, I thought I had found a way to import the excel files in the 20 things I love, it even looked good on the preview page but when I posted the page, it left a huge space in between, so, you will need to scroll down all the way to the end to see the rest of my assignment. Sorry, don't know how to fix it. I just realize it also cut off half of what i wrote. I really don't know how to fix this, I'll try but it might not be fixed before you guys get a chance to read it