Limit Randomization To Two Repeats

In essence, no. There are just too many possible constraints on randomisation to easily cater for in a simple GUI. To implement such constraints could require either of two approaches:

  • Use code to generate conditions files that satisfy your constraints. That conditions file would be used in a loop that is set to sequential rather than random, as the randomness is now built-in to the order of rows in the file. This would achieve what you want, but requires custom programming.
  • Alternatively, manually craft a conditions file that meets your constraints, and again present it sequentially. The disadvantage is that everybody would receive the same pseudo-random sequence.