So I've been leaking oil on the gear box side for a while, and when servicing the chain I discovered that the various parts on my rohloff are not actually secured properly (this is undoubtedly my fault, I undid this stuff when I was installing a different cog last year).
Looking at the first picture here, I'm going to call the part I'm holding the "outside plate", and the piece secured to the hub w/ two philips screws the "inside plate".
The issue is that the outside plate does not secure tightly to the inside plate. The outside plate's screws to screw into the inside plate holes w/o the outside plate, but they only seem to tighten about a half turn. In other words, the tolerances are very tight.
W/ the outside plate on, the screws just don't engage at all.
The second picture shows that the inside plate really is pressed tightly against the hub, w/ the philips screws fully engaged.