Hi @Anthony_Scott,
When you add files to Roon, Roon attempts to scan and identify the files you’re adding and place them into albums. Since you’re ripping these files directly to Roon, the entire album isn’t there all at once, so Roon tries to identify incomplete data, resulting in the duplicates when more tracks from an album are added.
Moving forward, there are a couple of options available. First, you could rip the CDs to a different location and then, once ripped, import them to the Nucleus’ watched folder.
Alternatively, while you’re ripping media to the Nucleus, you could stop RoonServer from the Nucleus Web Administration Interface. Will RoonServer not running, Roon will not try to identify these albums. When you are done ripping the files you can enable RoonServer once more.