Good Afternoon, Doc,
Join the crowd of those who find this situation troublesome. Possible solutions:
1--Few of us have 10 usable negatives on a roll, so sometimes it's possible to cut the film to eliminate one frame, leaving an easily manageable 9 frames.
2--If #1 doesn't work, just contact the 10th frame separately on a scrap of paper and tape it to the basic contact sheet.
3--Save the "extra" frames from a number of rolls and contact them separately at a later time. The tenth frame will conveniently have extra blank space for entering the date and other information. The stray 10th frames can likewise be stored in a separate Printfile page.
The 10th frame is a nuisance, but having the relatively large 6 × 7 negative makes it all worthwhile.
Konical