Microsoft@jwerwin80 - I am using the same computer / OneNote software version as you so it must be something within your settings. I would suggest you check to see if ALL your Notebooks are open by clicking in the purple More Notebooks link at the bottom of the left column as it looks to me in the 2nd screen you only have 1 Notebook. I have also experienced this issue with my tablet when I loaded a new version.
I also noticed that it does not appear that you are logged-in. Check: in upper-right corner ***, Settings, Accounts and you can see your login info. Also your name should be appearing on the right side of the purple bar at the top. If you are not logged-in (and on-line) you will not be connected to your other Notebooks as it does not show below the 3 purple leaning books on the upper left corner. See if that helps Jim.
