I understood none of what you said but all of what you meant, if you can believe that.  Maybe I have a hard time with reading comprehension--I don't know--but my experience with the activity system tells me what you said is correct (I think). 

You can miss out on activity periods if you don't post in one or more 2-week activity periods, right?  If that's the case, then we're definitely on the same page, and I still think OP will figure this out once he gets past the 28 activity phase.  After that, things should start becoming routine as long as he keeps posting routinely.