Body is offset

I can’t find this problem mentioned anywhere else, and have no idea what is causing it.

The body of my sites is being offset upwards and to the right.

Here is one of my sites:
https://www.baboocha.com/

And how it should look:
https://demo.billionstudio.com/?wptheme=Crafty%20Cart

Here is another of my sites:
https://www.openoodle.com/

And how it should look:
https://demo.studiopress.com/prose/

The layout also seems to shift when you navigate to different pages.

Hugely grateful for any suggested solutions.