In Microsoft Excel, if you have more than one spreadsheet open, and you use the “Arrange” option so that they don’t overlap - if you select “Horizontal” then it stacks them one on top of the other, and if you select “Vertical” it arranges them side by side. To me, this is completely backwards from how it should be. If you are arranging them vertically, then they should be stacked. If you are arranging them horizontally, then they should be side by side. I always pick the wrong one first and then have to go back and arrange them the other way to get them the way I want.
What are some other software functions that do the opposite of what you would expect them to do?