Teaching is exhausting.
I fixed the age data persistence issue (with data from other saves or servers getting copied to your current world). I’d implemented a semi-hack -fix on the Age Data to make it consistent for the server worlds. Now I’ve hack-fixed that to make it clear that data when the world changes.
The actual issue is with how such data is handled. I’d expected it to be consistent and stored once received, but Minecraft seems to like to create clones of it. I understand what’s going on and it’s reasonable, it just doesn’t work well for me. In lieu of implementing a better data tracking system this will have to do.