Hmm. I noticed yesterday when I checked in that I had to enter my known traveler number and passport information even though it’s in my profile and I’m pretty sure I confirmed that it was in the reservation when I made it a few weeks ago. Then I got SSSS instead of precheck, which turned 5 minutes at SEA security to 30. I assumed it was just a random selection, but I wonder if the KTN wasn’t in the reservation in advance and that increased my SSSS probability?