>thought it was weird that Encore didn't
Neil already answered that... you need to edit in PPro, and export MPEG2-DVD so Encore can do what it is designed to do
Forcing Encore to do something it is not well designed to do will result in problems and/or delays
The tutorial list in message #3 http://forums.adobe.com/message/2276578 may help, with more help in message #5