Since your isp seems to bounce back my mails, here is the answer to your mail:

Nothing is wrong. The statistics values are calculated on all roms in
the used datfile/database without caring for any parent/clone
relationship. The log/scanner output uses parent/clone relationships.
So if you're missing one rom of a parentset which appears in 3 clones,
you'll see 3+1 missing roms in the statistics but only 1 missing in the
scanresults window.

Roman Scherzer
ClrMamePro