Picture of 4x4, 4x3 and 4x2 sized properly and require an additional block to the right

Picture of 4x4, 4x3 and 4x2 sized properly and require an additional block to the right. Was founded in singleplayer when i tried create picture 4x3 on wall 4x3. Then i placed additional blocks to the right and to the left (that is 6x3) i understood that picture require an additional block to the right (i broken 3 blocks at the left and it dropn't, but when i broken 1 block at right it was dropped).