I never got a reply from my oath form upload. I realized this morning usually I get an auto-reply when I emailed them, but I got nothing. Thinking it was a problem with the attachment, I emailed them without the attachment to ask if they got it, and I got an auto-reply. So that made me think even more there's an issue with the attachement.
I had used a 3rd party tool to compress it since it needed to be below 1000KB. I used my mac to "print to PDF" that PDF, creating a new one, still under 1000KB. I sent it again to the email, but again received no auto-reply.
At this point, I don't know if the auto-reply doesn't happen if there's an attachment or if my attachment is getting blocked.
I googled and found someone saying they uploaded it via the web form, which I thought was a really good idea. I went ahead and did that as a backstop. They won't be able to say they didn't receive it within 48 hours as required, since that goes straight into GCMS.
So, I'm confident it'll get resolved one way or another now, with the web form. I got an email acknowledging the web form upload/message as well.