I actually found out that I had to:

A - Switch from XML to a CSV Data File

B - Duplicate the records for 3-Up (i.e. Records 1,2,3, then 1,2,3 then 4,5,6, then 4,5,6, and so on. If there were only 7 records, then you would end up with 7,7. If there were only 8 records, then you would end up with 7,8 and 7,8).

C - Add the "NUp Printing" Component on both Normal Pages with:
"Change data page with each repeat" checked on Page 1 and 2
"Advance data page before executing" checked on Page 2