That is odd because all of my UI’s uses the same buff windows primarily, but all the layouts were created going horizontally, not vertically.
Are you sure you didn’t have a different buff window in your UI that replaced mine?
The only way my buff window would work vertically is if you did what I mentioned to the other user above, by removing the Pieces for the spell icon names, then you wouldn’t have any issues, but you would obviously loose the spell names.
Now I never personally, resized my buff windows to go up and down… so maybe with the update the alignment acts differently when stretched in that direction, I am not sure.
Thinking about this more on the way to work, I remember my old code “Pieces” had a Buff Icon Piece, then a Buff Icon Name Piece, then a Buff Icon Piece again, etc etc. which could possible display them separately when resized. But now that DBG has all the icons in 1 template on their own, the Buff names had to do the same… so possibly that is what throws off the alignment going up/down I am thinking. At some point I can revisit this to see if I can also make it compatible for vertical but for now, I believe you could place in an addon that is vertical without breaking the UI.