4.Why would there be two names when the FW1 is connected?

Either side of the FW1 can be used as the master channel to connect to mobile phones.
When paired with the mobile phone, click L or R channel to pair with your phone. Then a connection prompt for the other channel L or R will automatically pops up in your phone. At this time, clicking "Yes", it would have two names displayed while clicking "No" with only one name displayed. At the same time the master-slave swap function would be disabled.
The left and right earbuds can work as a combination or individual, so it would have two names of L and R severally displayed.