those numbers correspond to the date validation for the date field:
$WAFV_Errors .= WAValidateDT(((isset($_POST["Date"]))?$_POST["Date"]:"") . "",true,"\b(1[0-2]|0[1-9])-([12]\d|3[0-1]|0[1-9])-\d{4}\b","","",false,".*","","",true,53);
Number validation for the txt2ShirtQuantity min: 2 max:2,100000000
$WAFV_Errors .= WAValidateNM(((isset($_POST["txt2ShirtQuantity"]))?$_POST["txt2ShirtQuantity"]:"") . "",2,100000000,""," ,",true,20);
Number validation for the txt2ShirtUnitPrice min: 2 max:2,100000000
$WAFV_Errors .= WAValidateNM(((isset($_POST["txt2ShirtUnitPrice"]))?$_POST["txt2ShirtUnitPrice"]:"") . "",2,100000000,2,",.",true,29);
neither spry or server validation will force decimals to be used, but they can be set to accept them.