For those keeping track. Just returned via suvarnhabumi from USA this morning on OA from Los Angeles issued prior to 31/10 (27/10) Again, asked consulate about insurance, said "not worry not 31".
I/O asked if I had, I politely stated, was prior to 31st however (this is the truth) went to L.A. to get O.A. so I could get health insurance (could not on ED visa), showed him my quotes which I had handy, he took some pictures of them and my visa, said "thank you" and stamped me in for 1year.