Ya I'm using a capture card. I think what it was is that I had audio recording on both track 1 and track 2 as when I deleted the second track I could still hear my voice but it was almost impossible to hear over the gameplay.
Track 2 is what I usually use for my audio only, track 1 for gameplay audio.
That should be it then. I run the same setup for my PS5 in OBS and I haven't had any issues. First rule of recording: always do a test run.