I understand what he means. He associated Item A (the Cube) with Mechanic A (Jump) and Item B (the Cylinder) with Mechanic B (Dash). This is typically a problem for low skill/non gamers who've not practiced mechanic-collapsing (grouping two or more mechanics into one technique to achieve a goal, such as JUMPing on a Goomba's HEAD to kill it in Mario).
Easiest resolution for the benefit of all players is that the tutorial should have individually taught the jump, then the dash and then the combination of jumping and dashing together, similar to how Mario teaches its concepts.