Hi Jaclyn,
Sorry for the delay in getting back to you. I'm not quite sure I understand what you mean in #1. Your question in #2 is a good point. When we originally came up with the design of Chorus we assumed that the folder in the cloud would mimic the local drive. So if the instrument was shared, the backup in Chorus would be in a common lab. Just like you probably do on the local instrument computer you move the data to separate folders you can do something similar in Chorus. That said I understand the complication.
It is fine to add the same instrument twice in chorus. You can't have the same serial number twice but you could always add an extra digit to the end to get around this. We don't confirm the authenticity of the serial number with the data.
I hope this helps.
Mike