So the Author(s): Unknown will always be there past the first model. Because you’re claiming ownership of the model, not the space it’s created in. That will follow as you import that model into other models, but once removed from the model space, it drops off.
sorry for the late response.. I understand what you are describing, I was actually trying to get the Model Author (eg a proxy for the file author) to be recognised as me rather than unknown in the default template rather than me having to explicitly for every new file having to toggle the “Claim Credit”. (It is long ago in my past but I recall this was a capability in AutoCad)
It seems as you say SU wipes the author data from the model attribute and/or component attribute when saved and opened as a template.
My only option is to bypass Templates completely and same my templates outside of the SU Template structure (eg on my desktop) and start new files using them as the original source as they retain the Model Author attribute in their file structure.
Frustrating that this workaround is necessary.. it really should be an inherent data attribute of any file.