I was told finally that the new depositing player had gone to this site from a different affiliates site quite awhile ago, did not join and then went to my site and joined. Since this player first went to the casino from another site, the cookies were recorded and the other affiliate got tracked and paid for my visitor…..to me that has always been the easiest explanation.
I would drop that program ASAP. Cookies are fine, but they should be overwritten so that whatever affiliate closes the deal gets the player. The player should belong to the last affiliate link they clicked on before joining.