Please do, already used one night this week not playing and trying all the different settings instead.
I have looked around at my settings and it looks like the bars all changing is a new feature or bug of bartender. I started swapping specs on different toons to see what would change, and while it looks like mounts etc stay the same it looks like recent moves I have made are not saved the way they used to be. I maxed my hunter on the last day of invasions and did wod intro at some point after the expansion release. When I spec hop on the hunter the I can see a potion revert from a wod potion to an older potion yet professions and other buttons I havent changed in a long time stay untouched. On my demon hunter I just recently prospected a bunch of ore and moved the prospecting skill to a hotkey for doing it, when I swap specs the prospecting button moves back to its original spot. So whatever functionality or bug is doing it has only been around since some time after the expansion was released but current changes for me are no longer saved across spec swap either, yet changes that are a bit older are saved across specs.
I am sorry I could not be of more help. I think if I was trying to set up bars now i would probably give elvui a chance. I was starting to set it up once but got messed up when I activated the multi monitor mode (I play with a triple monitor setup) and I couldnt get the mode to turn back off so I just gave up on it after I found a different mod to adjust what I was trying to adjust. Elvui would probably take a while to fully set up though.