The next four pictures are all of the bottom two rows in the top right block in the sheet, so positions 36-40 and 46-50. All have the "fat 3" in position 50.
The first picture is, I think, the oldest version of this sheet. It has the "missing 5" in position 48:
http://www.ivosteijn.com/Kolchak1.jpg
The second picture has the error corrected. It is hard to say which came first: sheet with error or sheet without error!
http://www.ivosteijn.com/Kolchak2.jpg
Then, another position in the sheet became damaged: position 38 now has a damaged "3"
http://www.ivosteijn.com/Kolchak3.jpg
Finally, we see sheets with damaged "3" in position 38 and "missing 5" in position 47:
http://www.ivosteijn.com/Kolchak4.jpg
I can only conclude that the first two versions of the sheet are older, so the "missing 5" error disappeared from position 48 and then later reappeared in position 47...