I emailed the nursing program the other day and asked them what the situation was with the TEAS checkbox and they got back to me right away. They told me I had turned in my application on February 16th and all my information and supplemental material was all reviewed by February 23rd. I still hadn't seen the checkbox at the time though. However, once they replied to tell me all my information was reviewed, I checked my application again and the box was ticked. So I'm guessing it was just a clerical oversight, not that they didn't actually get my scores. So if your box isn't checked, I wouldn't be worried.
And no, I also have not received email updates that my supplemental info had been received. But like I said before, they told me all my information was in and reviewed so I guess they're just not doing it this year? Hope that helps.