the reason for this is that offset doesn't begin its index at "1".. it
starts at "0." therefore, in order to start from the first row, you
have to offset 0. the best solution to this bug is not to create an if
statement, but rather to change
offset $rownum_first_this_page
to
offset [expr $rownum_first_this_page - 1]
that way the offset is correct for all pages. given the first solution
provided, one row would always be missing on subsequent
pages, which is obviously undesirable.
