I noticed that if you entered the same agent (i.e. "unknown") as a "Private Collection" and use it as both the source and receiver of an auction sale, they are rendering as being the same. Ideally, there would be a way to force the system to recognize these as two separate unknown entities. Possible solutions: Force an additional line to render, repeating the agent name and other address to render, if a different address has been used Add a rule: once the private collection flag is activated, no chain connection between provenance event ("by above") are rendered.