In my opinion a BUG.
While there’s two conditional interactions with a “set variable” with the same variable and value pair, when drag and dropping an additional interaction for reorganising sequence of events, things gets duplicated.
In my specific example I have two conditional interactions with the same set variable rRed] to “dark” inside. If I had another interaction inside either conditional interactions and reorganise the order, interactions starts to get duplicate in the other conditional element.
See video: