Thank you for your post, and I apologize for the late reply.
Yes, I can duplicate the problem. However, if in step "f", I change the current table from "Unknown" to THAT table, save and come back in, I am then able to select the "Evaluate this calculation from the context of _____".
I have forwarded this information to our Development and Software Quality Assurance (Testing) departments for review. When I receive additional information, I will let you know.