The Constitution Court has disqualified Chuwit from being the Member of the Parliament given reason that he has been a member of Chat Thai Party for less than 90 days before the Election Day. This started when 120 TRT members submitted a request to the Court to rule whether Chuwit had met the requirement when he dissolved his Party 30 days before the Election Day.
If you recalled, Chat Pattana Party merged with TRT in less than 90 days too. But the keyword here is merge. (merge = ยุบรวม, dissolved = ยุบพรรค) Seriously, what is the difference?