Thanks guys, 'm 99% certain that checked the box (I double-checked that it was checked ;)), but I get that things can become tangled around the deadline. I'll just have to submit earlier in the future.
I checked the public queue before I closed the challenge; it's either the checkbox or something else.
You may have forgotten to check the box to submit to the weekly? In any case, when this happens, we end up award "victim of circumstance" bronze stars. You aren't the first case we've had, and probably not the last. I'll let Mandrill know.
Is there a reason my piece was not included? It was uploaded around 10pm Pacific, hours before the deadline. I have previously uploaded much closer to midnight without issue.