Thanks for the log file.
If you look at it, you can see tha unpaper is only called four times -
or at least up until the point at which it is cut off - you seem to have
posted it before quitting gscan2pdf, and thus the bottom is missing.
I suspect that the extra processes you are seeing are due
Package: gscan2pdf
Version: 2.2.1-1
Severity: normal
After a scan of 44 pages, gscan2pdf has been running unpaper across
all of them multiple times. At the bottom of the screen, I am told
"Process 83 of 125 (unpaper)"
and when the next page loads, *both* numbers are incremented:
"Process
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