Ambigous behaviour shown by the dvd when played in two different dvd-players

[s_i]

I created a dvd using Scenarist. The dvd contains one vts with only one language unit which has many menus and only one title track. The pgc containing title has pre-command where it jumps to the first play pgc and the first play pgc goes to the root menu of the vts. Hence, there is no way to play title track. When I played this dvd in one of the players it directly started playing the title track while in other players it worked as desired by not playing the title track and jumping to first pgc directly and playing the menus. I am confused why this kind of behaviour appeared in the earlier player(playing the title track)? Is it that some of the players do not read the pre commands for the title track pgc? What can be the reason? I dont want the title to be played.