I wasn't aware of this limitation until I installed the LastPass app on my new mobile phone. I switched the active device to my phone to see the outcome. Now, I want to switch back to PC as my main active device, and I did, but the problem is that I have only one remaining switch. So, to use the authenticator app, I have to switch to mobile phone again to be my active device, but by doing so, I will lose access of LastPass on my PC. I need one more switch to switch back to mobile and to my PC, so I can use the authenticator again when I log into my restricted LastPass account on my mobile. I wish they would let us decide as a final option to choose the best fitting device for our needs instead of this switching thing.