it would be nice if that was the case but I only got the single entry as I was going to extend it at the Saraburi office when I got back from Aus. So I'll take Tod's advice and see if I can get a Non- O here.
I went thru just behind Ian and yes it was annoying to have the agent push in front as they took so long as well as a lot of arguments.
Fortunately for me my application went thru smoothly and only took about 2 minutes from when I got to the counter. All paperwork checked and approved, they did ask to look at the original marriage certificates, which were flicked thru in about 5 seconds and handed back.
Next day collected my passport with attached visa. This process was very quick, literally 5 minutes from entering the consul to leaving.
For the record it seems that once your paperwork is accepted, paid the fee and received the "ticket receipt" all's good and you just need to come back the next day to collect your passport.
Just thought I'd share that to help with any doubt regarding approval.
Thanks to Tod, Robert and others who offered me advice last month.