Superstition

Here's the dilemma. My chapters are about 8000 words long. It's a length I became comfortable with writing Magdalena Curse and I've stuck with it since.
But it means that Brodmaw Bay, at around 104 thousand words in total, amounts to 13 chapters. And so does the novel (at 105 thousand words) I completed over the summer just gone.
Is 13 an unlucky number? Is this a willfully perverse tempting of fate? Many people avoid the number, just as many (me included) avoid walking under ladders.
I've never succumbed to this particular superstition. Maybe, given the ghoulish subject matter my fiction deals in, I should. On the other hand, 13 chapters in a story dealing with malevolent people and the baleful magic they summon might seem peculiarly appropriate.
No dilemma at all then. Though my fingers are firmly crossed ... and I'm buggered if I'll ever put my left sock on before my right.