I was wondering why my posts weren't being submitted recently and I think I
found out why. I filled out the screen a number of times which displays after
submitting a post, but after that I have been canceling out of them. I just
noticed today, however, that you need to respond to that screen in order for
your post to be submitted.

In my opinion, this practice is a bit of an overkill on the part of
Microsoft. If you've answered it once, MS should structure the site so the
page doesn't come up for you again, or at very least that canceling out of it
doesn't stop your post from being submitted.