Would it better to have groups of individual scenes as posts. Or is this numbering system of a certain reasoning beyond, here's the total number of changes? You mentioned the problem with text character totals so if you spread out each scene/s to an individual post now, you'd have a more permanent location (to cross reference) instead of having to expand and shift content down posts periodically.
I guess i'm wondering for future fan edits, what if a new thread option could tap into a series of posts which reference the scripts, and those could be modified to notate and describe the changes. (stop thinking out loud)