I got my DTV and came into koh Samui immigration where I was stamped in for 180 days. The lovely officer took the time to explain when I leave and come back I get another 180 days. So it is exactly what it says on the tin.
I was thinking that. I booked a return to uk in May for a wedding but may need to book another flight to show intention to leave within 60 days? I hope you get your email tomorrow. Let me know how you get on