[afedchin]

To properly detecting movie as stereo 3D it should correspond two rules:
1. The main rule to detect what movie is stereo 3d the file name should contains '3d'. It's your case. But it's not enought to detect which type of stereo type the movie is.
2. Second rule is the filename should contains 'sbs' or 'tab' to properly detect which type of stereo the movie is.

Only if the filename corresponds to both rules then the movie properly detected as stereo movie.