OK...Mr Scott....easy-peasy!
Folders are wonderful, I use them ALL the time for all my listings and pixs...it makes them easier to sort.
Now, as far as moving them...no problem. Not that I have tried it, but it shouldn't matter "when" you move them back to your Main folder as far as before or after posting goes. And when you do move them, that's all your doing...you WON'T have duplicates and you won't lose them...(as long as you don't hit delete ) There isn't a "copy" feature at this time so that wouldn't be possible unless you go into any particular listing, start to make a new one, don't finish it and hit 'save as'....then you'll have a dup...but that's not what we're dealing with here.
So, in conclusion I would simply move them first to your main folder (not that it matters but just ask tech support to be on the safe side) and then put a check in all the boxes of the listings you just moved, hit the schedule button, then scedule them and you're done!
I hope that all made sense. Email me if you have questions....but it's not anything 'technical' or 'risky' moving them....easy-peasy
Cheers!
Kathleen