i see
i don't know if there's other software that can calculate coverage for large combinations but have a look here:
http://www.lotto-logix.com/lottosoft.html it's a nice collection of almost all lottery software available on the net.
(and i promise i'll look at your bug this weekend )
yes, i haven't done any changes in the win coverage code so i have no idea why you got those wrong results. however i did notice that your exported coverage report has some extra columns so it's very strange.
can you pls try to calculate the same coverage report on your maching again?