Defending champions Buriram United now have company at the top of Thai League 1 table.
While the Thunder Castle let True Bangkok United escape with a 1-1 draw at their home ground, Samut Prakan City edged Sukhothai 2-1 in an away game to tie Buriram on 35 points on Sunday night.
Buriram's Nacer Barazite put the hosts ahead in the 31st minute following a blunder by Bangkok United goalkeeper Michael Falkesgaard.
However, Pokklaw A-Nan, who was red-carded in the last minute of the match, set up Everton Goncalves for a header with a nifty cross in the first-half injury time to ensure one point for Bangkok United.
Samut Prakan had a brace from Teeraphol Yoryoei to claim a 2-1 victory over Sukhothai, whose only goal was produced by John Baggio.
Hosts Trat captured three points, defeating Nakhon Ratchasima 2-1.
Trat netted their first goal in the 13th minute through Lonsana Doumbouya, but Bernard Henry converted a late first-half penalty to make it 1-1. The hosts had the winner in the 75th minute when Diouf Bireme scored.
SCG Muang Thong United continued their upward march with a 1-0 home win over Chiang Rai United, who dropped two places to fourth spot after the loss.
The Kirins got the winner on 36 minutes when their new signing Derley struck home.
On Saturday night, Chonburi and Suphanburi played out a goalless draw.
Meanwhile, Port on Sunday replaced their coach Jadet Meelarp with former national team assistant coach Choketawee Promrut. Port, who led the league last month, have claimed only two points from their last six outings and slumped to fifth place.