V6.1 - Backflush Not Completing Operations on a Job

Good afternoon, all -

I've been working on our Job Closing procedures, and noticed that on
many jobs operations setup as backflush never show up as complete. I
went through a particular job and verified that we're following all of
the backflush rules for the ops (i.e. not the last op on the job, not
the last op before a subcontract op). All of the time-and-quantity and
quantity-only ops are complete (in some cases, I marked them as complete
using a labor adjustment). I then ran the "Backflush" program, but the
ops on this job still don't show as complete.

Does anyone know what I might be missing?

Thanks.
--Ari