Not really a bug, but in the default template, the level 1 Ladder item is just named Ladder while the level 2 item of the same class is named Ladder 2 (Four-Way). Anyway, I think that the level 1 ladder item should at least be renamed Ladder 1 in the default template. It would make more sense you know.
Personally, I renamed it Ladder 1 (Two-Way) to avoid confusion with the Four-Way Ladder.