Yes that’s bizarre.
Another bizarre thing is that there’s no recording device showing.
Does this have anything to do with the automatic-gain-control you were making? (https://forum.audacityteam.org/t/how-does-audacity-control-the-mixer-volume-on-the-computer/50360/1)
Also strange how your version of Audacity looks like it’s running on Windows (this is the Mac board). Was that unintended or are you running Audacity in Boot Camp?