Lessons learned were:
Increase PAD size :) these are solderable, but are just a touch too small
by the software default.
I'd ask you which software, but it is probably eagle with its
too-small-to-solder pads ;)
Quadruple check that all wires and nets are present. I
discovered that a
trace between 2 pins on the connector(s) disappeared on me at some point
during editing, it is entirely possible I deleted it like an ID10T. So for
this run of boards, wire-wrap wire will be my friend to jumper the 2 pins
at
the PCB.
Next time, use kicad, diptrace or something useful. Eagle sux.