@Chris *********
I just entered again, wasn't asked for anything. I am on Remote Work DTV and came in with Visa printed and TM30 printed. No issues, no questions.
I agree there has been a lot of misinformation and my guess is they are probably making sure people entering on soft power visas aren't trying to look for work after their intended course is over, thus, want to make sure they still have sufficient funds to accommodate their stay.