ok ive worked it out.
i went 2 copy tiles 1, 67 - 3, 72 on my map. i clicked copy, clicked the 2 tiles, it said it copyed. i clicked paste and it had infact copyed tiles 1,1 - 3,5.
and also, when i clicked paste, it didnt paste in the tile i clicked, which was 5, 68, it pasted up at the top in tile 4, 1.
also. the section it copys is determined in how far u scroll on the map. eg i scrolled so that tile 1, 67 was it the top left hand corner, therefore it copyed tiles 1,1 etc.
if i scrolled it so tile 1, 66 was in the top left hand corner when i go2 copy tile 1, 67 it will copy tile 1 ,3.
i hope u understand this, im sure its right, and i hope u can fix it.
edit: i tested and its the same for tiles if u scroll right. copy and pasteing tiles eg 100, 1 will copy and paste on tile 1, 1. as long as 100, 1 is in corner (no other tiles r showing b4 100, 1.