Your kit sizes dont work for pes 2013, the size was modified to 142x256. Then the sizes again been modified for pes 2014 but now with more difference. TheRGB scale is bigger as we have from 0/0/0 up to 63/63/63.
There is a problem that we cant see a preview of what we´ve done until we have saved it in the game. Another thing is that the ingame editor resizes the PNG´s imported to the game. PES 2014 let us to import PNG images for shirt, both sleeves, the front for both sides of the shorts and the front for both socks.
Until now we dont know about sizes of PES 2015 and we wont know until the game is released.