I'm thinking someone made a mistake with the font and they only realised once all the dust jackets were printed. Marvel being the skinflints they are, didn't recall them and are acting as nothing happened. DC do make the more glaring mistakes and more often but they have been good enough to recall Omnibuses such as Fourth World and Superman Morrson and provide replacements. I can't recall Marvel doing the same with the recent mistakes in the Silver Surfer and Bendis Daredevil Omnibuses or any other for that matter.