I thought I was losing macros 
If I hold down option and drag a macro to a different group, the cursor shows as a green “+” indicating it’s copying rather than moving, as expected, but it turns out that it moves the macro instead anyway 
Option dragging macros copies them in my testing.
Confirmed, running Keyboard Maestro 8.0.2 (8.0.2) on macOS 10.11.6.
Well, look at that: it works for me too, now I swear it wasn’t before! 