Duplicate Desktops across network
I have peculiar problem. I have MacPro (late 2013). It's wired into my time machine which in turn is hard wired to my google fiber router (via a hub). Recently, I purchased a new Macpro hooked it up, including to the time machine. I brought up Migrate Assistant and started to migrate from the old to the new. I got a message that it couldn't find my late 2013. and Migrate Assistant quit.
But somehow it did copy the desktop of my old Mac Pro to my new one. I've since moved the old MP to another location. But I can create a folder or document on one and it will appear on the other.
I have tried reinstalling the OS (the recovery partition on the new MacPro disappeared).
I think this is interfering with other elements - example, Sharepoint on the new one can't find folders on the 2013.
TIA.
Mac Pro