Folders don't appear when I import

Hello,

I have a bug when I import a folder in Lightroom.

In my volume, the pictures are organized like this :
02_August
  > 01_Training
  > 03_Game
03_September
  > 01_Training
  > 03_Game

Since I import folders from October, the tree structure isn't the same (the big folder October doesn't appear) and my catalog shows me the folder like this :

02_August
  > 01_Training
  > 03_Game
03_September
  > 01_Training
  > 03_Game
08_Game (this folder is in big folder called 04_October)
14_Training (this folder is in big folder called 04_October)

I already have this problem and a guy from Adobe Support helped me but I didn't remember the soluce.
Can you help me please ?