Logitech Transporter: Volume control via Volume button and Knob unsupported

I would love to be able to adjust the volume of my Transporter much like how the standard version works. This seems like a bug, not a Feature Request due to how core volume adjustment is to audio device.

Current:

  1. Press ‘Volume’

Result:
Does not toggle volume mode, master knob remains locked.

Expected functionality:

  1. Press ‘Volume’ button
  2. Transporter enters ‘Volume’ state showing the Db’s on left display.
  3. Turning the master know increases and decreases the volume.
  4. Pressing ‘Volume’ button toggles back to ‘Now Playing’ state

Here is Transporter similar to mine, if it helps.
http://a.co/eAHfK1p