A decal glich something like that or is it a bug.

Well if you use deals i think black ones and have a box and put all 6 space pictures or something like that and ocne your done and go in solo and zoom out you well see Parts of the decals.

yes. i think thats just part of the game, like the bricks. if you are out of 'the viewing range' some bricks disappear. same for decals i think.