Hi Bob,
You are entirely correct in what you say.
Yes, when we remove tapes from the robot they are put into a --- volume group which means that the robot does not know where they are.
The offsite group has upwards of 500 tapes in it.
From here we move them to a group called offsite when we send the tapes to iron mountain. When they come back we put them into onsite if there are too many for the robot.
With the call I raised support are suggesting, that the drop down not showing the groups is now a feature!
The last reply I had from them said that this was also a feature of 5.1 as well! Given that I have 11 5.1 masters and 2 6 masters I know this is not the case.