Found the fix
Quick fix is to change the sort order on vouchers to 740
Other fix is to:
change in catalog/includes/modules/order_total/ot_gv.php
Line 268:
tep_db_query("insert into " . TABLE_CONFIGURATION . " (configuration_title, configuration_key, configuration_value, configuration_description, configuration_group_id, sort_order, date_added) values ('Sort Order', 'MODULE_ORDER_TOTAL_GV_SORT_ORDER', '740', 'Sort order of display.', '6', '2', now())");
From '740' TO: '0'
Then make sure the GV sort order is ABOVE the coupon sort order (if coupons are 8 then GV has to be atleast a 9).