I agree, that’s what it looks like to me. Link.
Actually, here’s an idea. If you click at the top of the cliff, the ladder will be built all the way from the bottom to the top. Perhaps, not realizing this, you clicked each section of the ladder from top to bottom (or vice versa)? In that case, a new ladder will be built up to each point you clicked, with more ladders being built to lower altitudes.