Laughed at the orange roots part, we have all been there with a client who trusted us way too much. Index cards are smart and honestly they beat my system of scribbling on the back of a receipt and praying I can read my own hand later. Switching lines is the worst for this though, because the same formula number means something totally different at another brand.

1920s bungalow in Cleveland is basically the final boss of "nothing is square." I bet that wall has been bowed since before your grandparents were born and it's just been sitting there laughing at every level you own. Six hours on one gap is rough but honestly the box probably was fine the whole time, it was the house messing with you. At some point you just gotta admit you don't own a cabinet problem, you own a plaster problem. Good luck with the wall, that's a whole different kind of rabbit hole.