If it "looked strange" then no one from any western country would ever use the 30 day exemption allowance. Do they want confirmed return tickets or only tickets leaving Thailand? If so book some cheap flights to somewhere or fully refundable flights.
So basically you didn't do your research and expected another 30 day extension after already getting one previously. Preparation and research is the key. ;)
Yes so now it is a lot less years than it used to be so it is ruined for the normal folk. If you are under 50, not married, no children, no job in Thailand, an ED was one of the only affordable and available options. But the system dodgers have to screw it for everyone.....sigh.