Sub-Page content swapping with other sub-pages

[FashFlamingo]

I'm writing a complex novel.
I have sub pages within subpages and a lot of them.
I frequently have been running into a steady problem of my subpages meant for things like Inventory or character information and data being swapped to random subpages accross my project. As if for some occult reason the two sub pages are somehow linked.

It has happened so often at this point I worry about future project files. I may need to fragment them into smaller files and have multiple instances of the program open at the same time. I'm not sure if this is a user problem. I'm not sure thats possible.