This is a most instructive thread, and I can't wait to see the official answer.
Except we have given you the official answer
Developers word beats random ffg employee....
No. With all due respect to the various forum rules Meisters, the only answer I really consider official is in the form of a published Q&A or errata. An email from a developer I consider a strong guideline, but the only official answer is as I've stated.
That is not to say that I don't take these forums as a good source of clarification.
I fully expect a FAQ answer to Bomber Command stacking whenever they get around to it.