I got the same thing, even though I sent my transcripts right after I was recommended, and they had said they would email us Feb. 19 if transcripts weren't received. I was first notified that they weren't received a few days ago, so this time i sent an electronic copy and got confirmation that they opened and processed it.
I wonder though, would they bother making you send in another transcript just to withhold a "not selected" email? That seems cruel...