Seeing Shadows

I'm surprised how many people declare they aren't superstitious even though they probably checked the news today to see whether that famous furry seasonal prognosticator, Punxsutawney Phil, saw his shadow, thus predicting six more weeks of winter. I don't claim to be superstitious, yet just the other day I caught myself throwing a dash of spilled salt over my shoulder. Elders in my family used to caution us not to bring an old broom into a new house or even to sweep the floor from the doorway toward the interior of the room. These are probably just good housekeeping suggestions, but what is supposed to happen if we don't abide by them? Superstition is defined as "a widely held, but unjustified belief in supernatural causation leading to certain consequences of an action or event, or a practice based on such a belief." If I believe in supernatural causation, a divine creator, does that mean I'm superstitious?