It's technically fine, other than someone could shut off the one breaker thinking they've shut off the stove. When in reality there is still one 120 hot coming into the stove. Or they shut off the one that controls the light "ok honey, that was the one for the stove!" Nope, still got that other fucking hot line on. And thus was born the double pole breaker which shuts off/on both hots. 2 minute job, $15-30 depending on brand & store. *All breakers are sold by brand and non-interchangeable. In case you were unaware.