I think the once you put in the referral for a customer, it should stay there unless we wanted to change it. I find it hard to trace who the referral was when they come back at a later stage.
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Looks like this flew under the radar? I think that you should be able to put in referral and it stays the same unless you go to it again and want to change it. It will make recording referral data more accurate. I hope someone sees this and makes the change.