Not sure what POS means as that usually means point of sale. Unless you are using that to describe your on line application system - which might apply in more than one way
This sounds totally like an internal issue. Modifying one field in an original application does not result in a withdrawal or a decline. You need to be visiting with your vendor. Other than that - you need to figure out how to just trail the original application to the new one if that is what is required.