Ok I just it. Autoripple - but I have another issue, all of my chapters are labelled 1-50 and now I have to insert another chapter at the beginning - but it does not start at one, but rather at 51 - so my chapters will be as follows

51, 52, 1, 2, 3...

Will this matter in Arch?

DVDA doesn't care about marker numbers, only that you have them.