Yingcheep Atchanont, executive director of NGO iLaw, which is part of the monitoring group, said mistakes were not major but showed a lack of understanding or training by some election personnel on the ground.
“They don’t understand the system so they only do what they understand,” Yingcheep said, adding many complaints were over the same issues.
“I think in these cases they’re making honest mistakes.”
The hashtag “why do we have an election commission?” was trending widely in Thailand on Monday, with hundreds of thousands of users questioning the commission’s ability to deliver a fair and accurate result.
The commissioners were chosen in 2018 by institutions appointed by the junta after a 2014 coup by former army chief Prayut Chan-o-cha, who has been in power ever since.
The poll body endured intense criticism during the last election, in 2019, with widespread allegations of manipulation and negligence, after it delayed the official result by more than a month and it changed its formula for awarding party-list seats.
The commission at the time denied wrongdoing and said it needed time to allow recounts, disqualifications and by-elections.