I'm not sure that I believe them, at least about the includes/modules/sideboxes/order_history.php file. They may have just searched on the first part of the query, which would return that, not the bits that might be causing the problem.
The includes/modules/sideboxes/ezppt/recent_orders.php is a more likely candidate. It's not part of Zen Cart or any mods that I've used. Have you opened it up to see if it contains the errant query? Have you tried removing the file and seeing if that cures the problem?



