I have put two seats next to each other on the ticket exchange (can't be bothered to do it any other way).
They are: South Stand, Block 215 , Row S Seat 384
South Stand, Block 214 , Row S Seat 381
Great seats on the back row of SS level 2 but often when I list them they don't sell because folk think they aren't next to each other as they appear to be in separate blocks and the numbers are not consecutive (382 and 383 don't exist!).
Call supporter services and ask for them specifically if you still need two.
N.B. It appears I have only had 3 posts since 2007 as I changed my username from Desperatedon and it reset the post count.