I realized that a few minutes before your response, hahaha. Thank you for your patience.
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I changed :from_days_ago to 0 and everything in life makes sense!! 
It appears my brain was working chronologically with regard to what :duration_days meant. I thought that :from_days_ago was the first day where the query would pull data, then continue to do so, working chronologically in time (meaning data from 441 days ago, 440 days ago, 439 days ago, and so forth until present time). It appears it pulls data in reverse chronological order. Got it!