That's your problem stairchair (didn't mean to sound that way :-), leave all your marker's 'End Jumps' to 'not set' in the Connections. Setting them places a cell command, which forces a player's laser to seek up to the VTS.IFO file to find it, before jumping back to right where you left off. A non seamless affair by DVD spec rule (and hardware design limitations).
Take care,
Trai Forrester
TFDVD Research Labs
DVDVerification.com