It appears that Semic used the same ISBN for both the first and second print of books. So, for example, both the first and second print of #3, Don Martin vaers go, have the same IBSN, even though they must have different publications dates (not listed in the book).
Usually, the ISBN increases with each new book. So, #3 ends in -3838 and #4 ends in -3854. It appears that #2, Leve MAD, has an ISBN of -3870. That would put the number later than both #3 and #4.