More than two levels of [details]

Again, works for me:

  • 1
    • 1.1
      • 1.1.1
        • 1.1.1.1
      • 1.1.2
      • 1.1.3
    • 1.2
    • 1.3
    • 1.4
    • 1.5
    • 1.6

You just need to play a little with the alignment. This topic should also be moved to Support.