Hi Marc,
You'r right, it's a double work for me and very time consuming! 
As you know the primary goal of the Release Tracker Program is to increase project quality. But, as you know too, this is a loooooooonnnnnnggggggg process! Too long IMHO, because I think this kind of module is strategic for a company. What do you think about me if after having discovered a bug, I said to you "Wait a few months for the next version"!
I do not have simple solution. We (French community and I) do not want to be a source of problems, we simply try to reunify both projects. For this reason, we cannot name our version "Store". I had proposed to use only one name (Store) and to regard my version as being a beta version, and that the official version is the "certified" version. That would have been simpler for me, because I would have had only one version of code, but that was refused. I do not have any decision-making power, I am not member of Core Team, nor even Team member. If we manage one day to reunify both projects on the same version, then I would stop developing WWStore. While waiting, I board not other choice to only continue.
Gilles