@Garth *********
sorry that happened, you're far from the first person whose had this happen stamping in to thailand,
the up side is you got some 'free time' in country, (y)
the down side is you have to exit/re-enter to get that visa activated and get the entry stamp from it. π
Somehow I have the feeling that from now on you'll be checking those entry stamps while you're standing there at passport control π π
Good luck with the bounce out and back, π