@Luit ****************
Perhaps because the initial period was only 3 months, the first extension 6 months, and the second extension was a year, but during that year, I did not leave the country.
Perhaps it was just a mistake ... anyway. Your English wording is confusing. I would say, when one "enters" the country, a new "stay" has started. You can not leave and re-enter on the same stay.
Perhaps the conclusion is: read carefully the time period during which you can do the online reporting. Do it, and be careful with your emails, and if it is rejected, do it in person.
And as someone else above pointed out: you actually can do it via paper mail. Sent the copies, a prepared return letter with your address and a stamp, to IO.
I guess that is how I will do it in future. It would not be such a hassle, if I would not always have so much bad luck that a trip to IO and back home takes half a day :D 5555
When I lived in Nakhon Phanom, I basically lived at the farest possible spot from the IO office. Same when I lived in Lampang. And when I lived in BKK, same same again ... 2h trip to IO, 2h - 4h waiting, 2h trip back. I started to go there the day before and stay in a hotel one night. So I could be there when it opens.