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9. I have a number 3 in a circle next to each of my entries. Why is that?

That's a default rating icon.
In Books Xpress, you can assign rating icon for each book inventory item. 

If you don't want the icon, you can disable in Settings screen.

For this, 
Go to Books Xpress main screen > MENU > Settings > Rating icons
There uncheck the "Enable icons" option
Then, you will not see them anymore.