Recording saves two file type versions duplicates.

[MoriartyOwesYou]

Hi! This might totally be something that was my fault, fiddling with another software at one point, but when I record my stream to test everything, I get both a .mkv file and .mp4 file in the my videos folder. I already made sure the OBS output was in mp4, so I'm not sure where this .mkv file is coming from. Anyone have experience with this? They are identical and created at the same time. See the screenshots below for an example.
Thanks!

 

[Harold]

If you're doing auto remux in your settings, this is the correct behavior.

Saving directly to mp4 from obs is recommended in precisely zero situations.