I suppose they could have had a common root (Muay Boran) which could have split into the Muay Thai (physical) and Ler Drit (metaphysical) branches -- and then the Muay Thai forms became ascendant, and the Ler Drit forms fell into legend and rumor. And then when the Royal Thai Army created their "Ler Drit", they were just riffing off the old legendary name, not knowing there were still actual practicioners.

At least, that's how I'd play it out.

	Philip J. Moyer Contributing Writer, Editor and Artist (and Moderator) -- Eyrie Productions, Unlimited CEO of MTS, High Poobah Of Artwork, and High Priest Of the Church Of Aerianne -- Magnetic Terrapin Studios "Insert Pithy Comment Here"