Oohhh, hooray! I might get it myself, considering I don't spoil myself nearly enough. (And I have artbooks/doujins for my other two main fandoms, but nothing for GG.) ...where'dja get it off? I don't usually order shit online.
Copics do that too, though to a bit of a lesser extent than Prismas. (I've used both. I switched over to Copics 'cause I'm shit at controlling all media other than Acrylic )
I think the problem might be your paper. You should use something slightly heavier--maybe not Bristol Board, 'cause that stuff's expensive, but yeah.