Well you're right to the extent that Feb/Mar 2014 is chronologically AFTER August 2013 and the cyclical nature of the year means that it can be explained that way. I also get the training component.
But, in rugby terms, it's in a different calendar year and most importantly a different rugby year/season.
If SJRU went April to August and JGC was September/October, that would put them in the same calendar year, but more importantly the same rugby year. i.e. the SJRU 15s of April-August are the same JGC 15s of September/October.
I'm not sure what the answer is, it's just another chapter in the book of dysfunction in rugby junior development.
Ideally, as we both know, if 15s and 17s were part of the colts set up, then they would receive that coaching and development at club level and then an elite JGC could be run at the end. Win/win I believe is the technical term.
But that, as they say, is another story