Double Layered????

[rhodellf]

Hello
My question is not really related to authoring but I didn't know where to post it.
A very common problem I come accross every now and again is that some movies or clips that I download from the net, have a quite strange behaviour. All numbers and sizes are just an example to make the problem clear. So the movie is 600MB and the duration of that movie is known to be 1:10'.
I download the movie and although the file size is right, the duration seems to be 20 minutes. So the progress bar of the windows media player is lets say half way through the file MEANING that I am in about 10 minutes of the clip. So I let it run and when it reaches the 20 minutes which the player recognizes it stops there.
NOW: If I put the progress bar to some previous point (before the end) then I can watch a different scene of that movie that has NOT shown during the first playback.
In short, if I put the progress bar in the same length of the clip (lets say the middle) every time, I get different scenes.
Is that because someone made this clip in a double layered DVD, and how can I overcome this problem and fix the duration and the flow of the clip? Is it an encoding issue?
Thx.

[RottenFoxBreath]

try another player like the divx player,windows media player is mediocre at best.