It shows moves that lead to a known position, not moves that have actually been played. Makes not much sense and may even be counterintuitive for less experienced players. For instance here:
http://de.lichess.org/mOIiPs3W/white/analysis#14
The explorer gives 8.Nbd2 as the main move by far, although it is actually a poor move. But how recognize this when you are a beginner, see this and think "yup, looks like normal development"? Black has already misplayed the opening, and White should be happy to get Nc3 in, but the opening explorer leads him into the wrong direction.
I could come up with many more of these.
http://de.lichess.org/mOIiPs3W/white/analysis#14
The explorer gives 8.Nbd2 as the main move by far, although it is actually a poor move. But how recognize this when you are a beginner, see this and think "yup, looks like normal development"? Black has already misplayed the opening, and White should be happy to get Nc3 in, but the opening explorer leads him into the wrong direction.
I could come up with many more of these.