I am pretty sure on my old PC when I was using bartender it would auto shift the bars when my resolution was different. Since I play on 3 different PCs with different size screens this was nice.
On my new PC i have tried to run wow with a minimal of addons as possible since you added these new features to the game.
So I setup 4 action bars on the bottom of my screen but my main PC is 2560x1440 now when I play on any other screen the action bars are getting pushed up over each other rather than just shifting the entire block of them up to compensate for being on a smaller screen