Can't export to 1920x1080 unless I set it to Square Pixels

Premiere and Media Encoder both export to 2800x1080 when I try to export to 1920x1080 and DV/NTSC 16:9. If I set the aspect ratio to square pixels, it works, but then there's a black box around the video.

The clips I'm using are native 1920x1080. I've attached an image of my export settings. It's H.264, resolution is set to 1920x1080. A few weeks ago, this was working just fine. Now it just doesn't. I've tried new projects, I tried reinstalling Premiere. Nothing seems to work except square pixels, which I do not want.

Last week, it was exporting to 2327x1080, this week it's 2800x1080. Has anyone else had issues like this?

Export and sequencing settings attached as images.