Maja,
North Carolina had a simple number populated for the data load and is using a GUID for editing, in either cases that field has no meaning for us.
If I understand correctly you want to have a unique id value for the point that other data can be referenced. I would another field/s for the point id that you would maintain and populate. Just casually observing the field for linear events I don't think it would work the way you intent it to but I don't interact with point data that frequently to see if it behaves in the same manor.
Maybe someone from esri can example the intent/purpose of the field and how they envisioned its use?
