[Abravefan11]

Great post Erick with a lot of interesting questions. I think there are a number of possible variables that would effect the numbers.

One possibility I find highly likely is there were multiple sheet configurations with some subjects on say two sheets and others on only one. These different sheets could be created at the same time, or when the same back was printed at different times.

I don't think we can rule out different sheet configurations. For example let's say a sheet was 34 subjects, two rows of 17, with each repeated three times vertically for a total of 102. It's possible when needed the sheet configuration was changed to three rows of 17, with each subject repeated two times. This would result in 51 subjects per sheet totaling 102 cards. You could have a sheet of 34 and a sheet of 51 for a total of 85. This would also create a different ratio of one group of subjects to another within the same subset.

This is all just speculation, but fun to think about.