Went to check the country, then saw the note saying it previously published in a single hardback volume.
Looks like the publisher split it up for the paperback
Yeah they did. I'm in the land of Britain and Amazon kept on bothering me being like - hey! Hey! look at this new GOT book you dont have! - So I checked it out in WH Smiths (Like, picked up the two books and read bits to see what was goin' down) and they just split the hard back into two. To be fair, you could kill a baby with the hard back so that's probably why.