Hi Brian,
This strikes me a an odd use-case for Dynalist. I’m not saying it’s not valid, however like many others, I come from Workflowy. To me everything in Dynalist (including the folders/documents themselves) are just a single giant list. While there has been discussion before about Cloning Items, in your case, perhaps you may want to consider a less structured view of your documents. Yes you have them under one list/category, but if you use #tags to help reference other areas they may be applicable to then you can use a quick search or even link to locate the documents by category.
Personally, between tags and linking to other documents, that’s generally how I handle cyclic references rather than pure duplication.