Hello, I think I have the same problem.
Only with imported entries, the group/folder information for subgroups is wrong (in particular, the name entry contains the parent group) but it's displayed right.
For example, a sub-folder named Italy\Rome is imported right and is visually OK. But looking inside its property, you can see in the General tab that the name entry is Italy\Rome and the Group/folder entry is Italy. Whenever you press the OK button (even without touching anything) the folder changes visually to Italy\Italy\Rome and its property reflects it.
New entries don't have this problem.
Only with imported entries, the group/folder information for subgroups is wrong (in particular, the name entry contains the parent group) but it's displayed right.
For example, a sub-folder named Italy\Rome is imported right and is visually OK. But looking inside its property, you can see in the General tab that the name entry is Italy\Rome and the Group/folder entry is Italy. Whenever you press the OK button (even without touching anything) the folder changes visually to Italy\Italy\Rome and its property reflects it.
New entries don't have this problem.