I recently noticed this issue where the Alt & Ctrl+Alt functions were not doing what they described.
As I went to test, I realised that the “Auto-Compare items” setting is actually inverting Ctrl for tooltips.
As a result, the functionalities of Alt & Ctrl+Alt are swapped around by this setting.
I honestly like the current functionality (I rarely need the explanation text, while it’s good for new players) but would think the tooltip info at the bottom needs to change to reflect this setting, or add more info on the setting itself.