The photo doesn't picture all the EconomyExtra seats, which go from row 6 to row 12 (which totals 7 rows).
Thank you. ... This is the pic from their seat selection section of their webpage.
It really didn't help that much when choosing seats because the seatmaps don't match the pics.
There is very little info regarding economyxtra on the a321lr and no reviews on YouTube that actually shows the seats so flyertalk seems to be the only source of real info.