How does the Structured History Work

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Hi,

I am trying to run a report based on activity within 1 week. For instance, how many candidates were rejected, shortlisted, interviewed etc within 1 particular week. When I use the Structured History "From: Date In" and "To: Date In" and I select one week, it seems like it gives me duplicate entires (i.e. a candidate who was rejected shows multiple times). How can I avoid that? I've tried several ways, but it seems like I am doing something wrong.