you have the repeat region to show only 100 records:
$maxRows_rsExhibitorsAugust = 100;
$pageNum_rsExhibitorsAugust = 0;
Is you are going to limit the repeat region, you will need to add paging controls.
Ether set the repeat region to show all records, or add paging controls so that hte user can select to see the rest of the records.