OneNote: Things are moving around on their own!

So, I write my notes for class in OneNote. I write equations. With a lot of variables in them. It's important that they stay perfect so I can actually study from them.

Lately, things have started moving on their own. A division bar, an answer, a highlighting, whatever. They slide up the page on their own. Sometimes just a bit, sometimes a LOT. All my equations are ruined on one page, but fine on another. I never actually see them move. I go back to look at something else and come back to the page I was on and everything has moved.

I can't take it. My notes are being ruined. Why is this happening, and how can I stop it?

I'm just making everything a blank page. Here's an example: http://scrnsht.com/nzggyi
To tell the truth, I have no idea where everything was supposed to be...

I'll definitely give the grouping idea a try. Using a different program isn't an option for me, though, as I already have a month's worth of notes in OneNote and am also taking notes for English and French classes, not just math.

Thank you for the suggestions!