Dear User, that is how we designed the app. You select 3 subjects and our software randomly picks any of the 3. For example, it can pick 1,2,3 (subj1, subj2, subj3); 1,2,2 ; 1,1,2; 1,1,1; etc. The random subject selection was added just to make the experience fun and unpredictable. Your case is unique, you got a perfect number thrice...Kudos!