When you drag a button with the button unlocked, it will not go to where it should . Instead, it will go to where the bottom right corner is next to the top left corner before you let go when dragging it.
I have having the same problem as Locked is with the button dragging. Now that I've figured out the manual settings through the config it's okay though. I wasn't hitting Return after each filling in a field to get the positioning to take effect. Industrial's comment about 36/-36 helped me make the leap too!
The scale slider for the buttons seems to be working in .05 increments but only shows the tenths digit. So you get two notches on the slider displaying .9 that I believe are .95 and then .9.
My only additional feature request beyond what others have already mentioned is, I would like checkbox to set a bar to only show on mouse over. Being able to check that and "show out of combat" would be great for a profession bar I don't want to see unless I want to use them and I don't want popping up if I'm mousing around in combat.