No worries you didn't mislead! I also submitted that extra MoDTS essay. I'm still waiting for the recruitment weekend they'll set up for me, but I'd guess it'd be the same as yours. From what I gather with UT Southwestern is that they tell you POIs you'll be interviewing with when you actually get on site.
Congrats on all your invites! Looks like we got into similarly ranked schools, but I went more West Coast. I'm holding on to that sliver of hope for Stanford Genetics lol....