It's an issue that could be solved within lemmy where communities with the same name should be able to merge and show each others content.
It also happens when users join and pick the largest community at the time, which may be overtaken later but the user will never know unless they often go looking
The despecialized edition uses a ton of cleaned up shots that don't change in a story sense but have grain and wires and other compositing errors cleaned up. These are new works. Even the VHS release and any HD releases could be considered new works as the colour and sound would have been tweaked for each format. The best thing to do would be to find an original film print and have it scanned. Anything else would push the clock back.