ROU (Romania)

UN SALB - The data they have on Romania is ADM1, not ADM2. From what I can tell, the reason for this discrepancy is an EU classification. The EU breaks Romania down into a few different economic zones. I think the UN calls those zones ADM1. When the UN goes down to the next level for ADM2, they use the official Romanian ADM1 as their ADM2 data. The problem is that those economic zones have no administrative purpose within Romania itself and are thus not ADM1.

Sources: https://www.unsalb.org/data/rou