jQuery/AJAX:每个，if, post， .html:运行，但随机删除数据

I've got a PHP page, with FedEx & UPS tracking numbers in a MySQL database echoing into ID's of DIVs with the class "trackingnumber". My JS each's through those divs and grabs the ID to then post to a PHP page that polls Fedex/UPS and echos the result from them. That works great, except for one thing. It randomly deletes the data after it's loaded it. So the data will flash on the screen for a second, and then disappear. It's random too, which just baffles me. Check out this I've got a PHP page, with FedEx & UPS tracking