Elements overlapping player

Hello,

I'm having trouble with some of my design elements that are close to the bottom of the screen. When I'm designing, all elements are shown to be fully on the slide, nothing is overlapping off of it. However, when I preview and publish my program, many of the elements overlap onto the grey outline of the player, as you can see below. I've tried to move them away from the bottom edge so this does not happen, yet it still does. Any answer as to why this is occuring? I have been working on this project for awhile, and earlier in the week this wasn't happening, so I'm quite confused why it is now. It seems to have started out of the blue.

Thanks for your help!