Symptoms

Transferring data in a For Loop between two List Views results in the row entries not "taking" to the list in each pass.
 

Diagnoses

The rules were ordered as follows: Transfer data from View A to a parameter, add a row, edit the row, transfer data from parameter to View B, apply the changes made to the row.
 

Resolution

The 'add a row' rule sets the row to editable by default, so the superfluous 'edit the row' step seemed to be unflagging the row as having been edited, and when applying changes to the row it dropped any content within the Add/Edit controls. Removing the 'edit the row' rules worked.