TreeTable limit number of levels

Hi,
There are limit of level in a treeTable? I have some troubles in get an treeTable with more then 3 level’s the 4 level appears as a 1º level.

Reards,
João Gomes

Hi,
I take two screenshots to show what happens when i create de structure (before save)beforeSave and the result after save afterSave

João Gomes