Using V4 + DVD-A 1.0

My chapter point/markers SEEM like they're OK in Vegas, but if I preview in DVD-A, my "next chapter" remote button will forward two chapters, skipping one. Everytime I try to go to the next chapter, it moves two.
I rendered as a DVD-A MPEG video stream in Vegas with a separate AC-3.
The burned DVD also does this with my remote.
Any ideas where I screwed-up?

Thanks

Mario