Here's the set up right now. I have the stock RO valve, a "T" to the top off side and the Jug filler, both with their own valves. The Jug side remains closed unless I'm filling, and I added a valve to the top off side to close it off when filling jugs. This is to prevent a back pressure siphone out of the sump. (Wouldn't that taste nasty?)
So the way I see it, regarless of where to water is going, if the system is depressurized the selenoid should open up right? I'm not worried about the auto shut off working when filling jugs because I only do that when I'm around to keep my eye on it. Let me know what you think.
Oh, and I've thrown in a few extra pics of the system just for fun.

How NOT to wire your system.
