i thought the same thing as well…but the admins in here deleted my comment and told me I AM WRONG…so therefore if the admins within say it then it is the word of God..
Since there is zero limitations on entrances either via air or land…I say book a sane day flight, go early morning get lunch in Cambodia then schedule dinner in Thailand
If you want the cheapest and easiest way…buy a ticket from DMK - UBP for early morning then take a tuktuk/grab/bolt to the border from the airport…do a border bounce…return to the airport and return to DMK in the afternoon…super easy
Wrong wrong wrong…there is no official limit on either air or land entrances into Thailand…enter as many times as you want..the only thing standing between you and entering is the I/O and the power of the stamp