OneNote issue

Hello, I am not sure if this is the right place to be posting this - But I've been thrown around to a lot of different people yesterday and today and still have no resolution and I desperately need this fixed. So I have numerous lectures on my one note...Starting a few days ago, OneNote has moved the highlighting and notes I made on a few lectures all the way down to the bottom of the page into a blank space. In addition - on the same few lectures - every time I try to re-highlight and then switch to "A" to type in a note it immediately erases the highlighting. Does anyone have any idea how to fix this problem so it doesn't keep happening? I have already tried uninstalling and reinstalling Microsoft office, restarting the computer, and doing the office 365 repair...Nothing has worked. HELP!