D'you think these were haphazardly designed by Mr. Louboutin on a carefree day off, relaxing on his banana lounge on the beach of some exotic location, martini in hand, sketchbook in the other? Yeah? So it seems plausible that, in an utterly relaxed state, he simply forgot to finish drawing the random bow plonked on the front?
Oh geez, I'm being silly. Of course it was done on purpose. Fabric is expensive, you know. Chopped up bow-ties are so much more economical.