Rendering issue (using non-existent camera to render sequences-Ocean Floor Environment-Marketplace)

Hey everyone,
When I try and export a series of frames (even with a new camera) the sequencer selects old positions for other cameras and renders those. I tried moving all the cameras to the new position. That didn’t work. I tried deleting the other cameras and that still didn’t work. I also noticed the thumbnails in the sequencer are super dark (but Actually show the correct scene) which I believe is because of a fade in effect which came with Ocean Floor Environment as a preset but … anyways.
I’m just lost. Any thoughts?