Site looks different in my dashboard than in clients browser

It was recently brought to my attention that there are some funky errors on my site that I cannot see from my very own computer. Under both “Investment” and “About Us” tabs there is a tremendous blank box under that headline. I can’t seem to figure out where it came from or why it’s there. And I don’t understand why it is not showing up on my own screen…. Any help would be greatly appreciated!

Much Thanks!

darlingdearphotography.com