Not correct. One can request a visa and due to long request period already enter thailand before the visa is assigned.
Furthermore you can have a DTV and a Non B visa with workpermit. Cases already known where people while on DTV found a job here and got the apropriate visa. No problem. The DTV is still valid but pauzed.
In 90% of the countries it was already mandatory to use the eVisa system to request a visa for Thailand. The recent news was only about the last few countries who now also are in the eVisa system.
Most immigrations want everything printed. E.g. Chiang Mai did not even accept i showed my booked time on my mobile. I had to print the confirmed booking.