I found this cool scan of the original art for Giant-Size Spider-Man #4 splash page. If you look at the bottom of the art board, there's no room for the indicia below the end of the art and it almost looks like it was glued over some of the art. But if I look at a scan from the actual comic, the indicia fits just fine. But look at the splash itself, it's tilted slightly to the right, where Ross's upper boarder is straight across. It looks like perhaps Marvel reduced the original art page slightly and then added the indicia below it, but they were a little careless and the page ended up tilted.
Why these little quirks fascinate me, who knows.....