It's probably just the code that is on the side panel in the cab that lists the destination which is what the guard/driver have selected, Manchester Picc is used so the destination screen does not scroll.I'm guessing the destination is entered "manually" (once) whereas the calling points are from the "standard" CIS database like Manchester Picc, Birmingham Intl etc
It takes the guard to open up the document with all the CIS codes in, find the right one for the service and then put it into the system. Only then will the CIS properly function.
Oh and don't forget to make sure that the unit that you have got doesn't have a non refurbished unit attached to it as you won't get the full experience then either as it interferes with the brakes (or something along those lines)
Sam
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