Okay, I have a 3 column page, found here.
With SimonJ's help, I've got 2 loops running. Loop 1 is in the center. It displays categories 19 and 20. Loop 2 is on the right. It displays all other categories. What I would like is to be able to navigate through the pages of each loop independently. At the moment, when I page back in the right column, the blog also pages back in the center column.