Are you sure it is saying A
E F K, and not A
D F K? - there is a fourth config (I think Thai is back on track to seeing how many different seats they can have across one sub-fleet...

) featuring the Super Diamond seat, that does not have the alternating one between B EF J, A DG K. And then of course there is the out-dated 2-2-2 one.
Have a look here for the one I suspect you are on (the site will also give you the other three):
https://www.aerolopa.com/tg-359-2