@bagheera1
sorry, I really cannot replicate the issue: if I edit the script (by deleting the AddBorders line), it becomes red and then any kind of changes (Video/Audio/Subs/Chapters) will not reset the script back. What release are you using? Do use the latest Alpha, which will become Final within few days.
A suggestion: use VerticalResize command (94%) to have the AddBorders filter removed. Unfortunately AVS files DAR is exactly W/H and not a separate flag, like other containers have.
@Sjakko
right now it is not possible, as you have already discovered. It is an old feat
request that I have delayed in the hope that BatchMux would include in a earlier release. Since more a year has passed without news, I will put it in the AVStoDVD ToDo list.
Bye