The important thing is that you Have a "scheduled" assignment. Used Bank money to DH to work under your exact scenario in January, no issues w/ the expense report
As I understand it, "Just Culture" is for FOM things, not the reasonable person contractual things. Frustrating though it is, I just run with the mindset that CRS is likely to tell you almost anything in hopes of keeping the freight moving, up to me to keep them contractually honest