i can , had the same , DTV and only 3 month , was at Thai/Cambodia border coming back . Posted it then here too. I even told the IO it was 6 and not 3 but she refused to correct it.
I did not make a fuss becaus i was leaving Thailand again 3 weeks later.
wise, i entered in Poipet 1 month ago and the iO only gave me 90 days. When i said it was 180 days , she repeated 90 days. I did not say anything more because i was leaving in 30 days anyway.