Doubling amount of Days for AM6?

[shub]

If you choose to do the refresher for the second run, of course, that will be six months straight using that one stage, which is fine, but for some people may become boring. Part of why six stage sets are six stages is to prevent subconscious boredom.

Does that mean that in subs like AM6 and BASE one can start using the refresher after one run, without losing any benefits?
I was under the impression that 6 stages are to be run twice or preferably thrice before using refresher as the whole program...