Ok what the dinky heck gives ????

The DVD I bought and the box it came in says it lasts 124 minutes.
That's 2 hours and 4 minutes.

IMDb here says 1 hour 44 minutes.

Sure enough.....
...put the DVD in the player.....
.....start the movie.....
.....and immediately click on time remaining button.....
.....says 1 hour 44 minutes 35 seconds ( time elapsed is 0 hours 0 minutes and 9 seconds)

So what's going on here????

Where did these 20 minutes go????