Not following the 2nd 2 column table...
Is this something you are populating from outside the form (binding XML data?) or is it bieng entered on the pdf itself?
Not sure if this will help. We had requirement to have 3 columns on a page and in each column was a text box to be numbered going down, the top of the 2nd would continue numbering down the 2nd, then to the third, then continue on the next page column 1, 2, 3 and so on...
See the xdp, corresponding xsd and sample xml