Why Is my Mic not recorded on OBS Stream?

So I checked all the usual suspects: Mic audio levels were moving, unchecked exclusive mode on microphone, made sure microphone was not muted in Windows or OBS, verified desktop audio could be heard on the stream. But somehow OBS was not sending my Mic/Aux to either the Stream or Recording. Discord had no issue picking up my voice so it had to be something in OBS. Clicked on Advanced Properties on the Mic/Aux under Audio Mixer. I see that track 1 was assigned to Desktop Audio while track 2 was set for the Mic/Aux. So I clicked Track 1 on the Mic/Aux as well, magically the recording now has sound. I notice that the track selector on Stream is a radio button, only one can be active.

UPDATE: Found a similar issue in the OBS Forum