Ah ok, I thought they were getting rejected because the arrival date is after their TM30 was previously submitted, so when re-entering you must register a new TM30 with the new date is on the system
Sorry but I think you already new the answer after being out of the country for so long, and should really know when you go for your 90 day report so close to your extension ending they would be looking for an up to date TM30
I believe you will be due a 90 day report after 90 day ( Day of arrival counts as day 1) and apply for your extension 30 days before the one you have now runs out
If your in Roi Et your not a Million miles from Mukdahan, where you can nip over the Bridge to Laos and get a 30 day visa exempt when you reenter, have a day out then you can extend for another 30 back in Roi Et