Thanks Stan,
So if I export as a .m2v instead and import that to the timeline, it might behave itself? And yes the menu audio seems to work OK.
Perhaps...
The most reliable workflow is to export your asset as I described. You get an m2v and audio file (wav or a3c). I would create a new Encore project as a test, add one menu, then import "as timeline," selecting the 2 files. Is the video "do not transcode"? Then add the scc and see what you get. To test the scc, burn a test (rewritable) disk..
If that works, you can try to add it to your existing project, but Encore is not forgiving, and you may need to work in the new project and redo the menus.