for both websites i checked, both are on different hosting servers and both have the order id that is sent to the gateway set as the session id.
so both sites i have this issue with are on 2 different hosts and use 2 different gateways.
but both have the sessionid set as the order id sent to the gateway.
i know that others are having trouble with this (ie others using other carts etc).in my quest to solve this i found many message boards on this topic.
The issue is that somehow even if the transaction is not approved the order id that is sent to the gateway is logged. so when trying to run it again (ie user goes back to modify info) its using the same session id still. so thats when the error occurs that it says the order is already exists. it exists in the gateways database.
has ANYONE else found this issue? ways around it?