I'm not sure why you're making it so complicated. Maybe I'm missing something.

my %q_u;

open PAGELOG, "< page_log" or
    die "unable to open pagelog for read: $!\n";

while (<>) {
    chomp;
    my( $queue, $user, $jobid, @rest ) = split;
    defined $jobid or next;

    $q_u{$queue}{$user}{'jobids'}{$jobid}++;
    $q_u{$queue}{$user}{'npages'}++;
}

close PAGELOG;

for my $queue ( sort keys %q_u ) {
    print "[$queue]\n";
    for my $user ( sort keys %{ $q_u{$queue} } ) {
        my $nj = keys %{ $q_u{$queue}{$user}{'jobids'} };
        my $np = $q_u{$queue}{$user}{'npages'};
        print "  [$user]\n";
        print "     $nj jobs - $np pages total\n";
    }
}
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