My website is so weird now. The order page is fine but my pay list display other random products when it goes to Papal page and also the amount is more than it should be payed.
I checked the admin page, the order amount and the products are correct. I don't know why the system add some random products atomatically when I pay the money in papal or other payment mothod.
As @muk_t stated, check if you have added any customized code added recently then temporary remove that code and then check. Also check if you have added any extention lately. If so, then disable that extension and then check.