I fear my friend that you have a dud copy. The stapling on my copy of Warhoon #26 is neatly spaced, as it is on every other issue I have in my collection. Ah well, try and look past this deficiency and appreciate what is without a doubt the single most attractive cover to ever front an issue of Warhoon.

My guess by the way is lithograph. He wrote in an earlier issue about sending another piece of art to the printer which makes sense given he was still fully employed at the time and probably didn't have the spare time silkscreen several hundred would require.