"The number of the first prize for the Dec 16, 2018 draw is 356564," a woman announced during the live broadcast of the draw on Sunday, but a lot of viewers though otherwise.
Social media was soon abuzz with posters arguing the number might not be right, and the second to last number was actually a "9", not a "6", and that it was presented upside down.
They substantiated their argument by showing that the number 6 on the ball for the third numeral from the left, shown in its box, had a line under it, but the ball for the next-to-last digit did not seem to have that line under the numeral.
"The GLO must answer this," the headline over Samakom Chomduang's video on YouTube demanded.
As 6 and 9 are very similar, the GLO differentiates those two numbers with a line underneath one of them, the 6.
GLO spokesman Thanawat Phonvichai confirmed on Monday that the major prize on Sunday was the same as was announced during the draw.
He said the line under the 6 in the "tens" box might not have been clearly seen on television screens. (continues below)
All numbers in each draw are picked to international standard with guests invited as witnesses, the spokesman said.
There were no protests on drawing day, Sunday, he added.
If the top prize number was wrong, one of the unluckiest buyers would have been Jintara Bandasak.
Ms Jintara, from Nakhon Ratchasima's Prathai district, won 30 million baht with a set of 356564 tickets on Sunday. She has been working at a minimart in Angsoeng city, south of the South Korean capital Seoul, for the last five years. (continues below)
Her aunt, Sawaeng Onsri, told reporters in Nakhon Ratchasima on Monday that she had confirmed the numbers with Ms Jintara on Sunday.
Ms Jintara bought the tickets at her workplace in South Korea, and she was now on her way home for merit-making, according to her aunt.
"We plan to welcome the lucky woman right at the airport," Ms Sawaeng said.
