I think what is you're describing is a multi-column report, wherein a set of fields repeats across mutliple columns, like this:
R1 F1 R1 F2 R1 F3 R1 F4 R1 F5 | R3 F1 R3 F2 R3 F3 R3 F4 R3 F5
R2 F1 R2 F2 R2 F3 R2 F4 R2 F5 | R4 F1 R4 F2 R4 F3 R4 F4 R4 F5
/font[/quote]where Records 1 and 2 are in the left column, and Records 3 and 4 are in the right column. Each column has the same 5 fields.
If this is your situation, you can handle this using Multi Column Regions under the Template menu in the report window.
You define the number of columns and the width of each column. Afterwards, you define your template within the first column.
Does this point you in the right direction?
If I understand correctly, you have a report that has two sets of columns, each set with the same 5 columns, and you want to create a single model that gives you, in effect, two rows of output for every input row. If this is the case, Monarch has the ability to define multi-column regions. It's not easy to describe the whole process here, but if you search the Monarch help for "Multi_column" you will find two sections that explain the process.