KH: good suggestion. And, yes, I have every detail re time and events, copies of relevant documents, and all that good stuff. Same as what I sent to the OB. So I guess I'll make copies of everything again and do the registered mail thing as you suggest.
What I was really interested in finding out is whether anyone else had experienced this sort of delay with the AC OB. It feels like the kind of treatment you get from AC HQ.