You probably should remove the first set of dances, since they were from the meet the top 20 and everyone was dancing in his or her own style.
Also, it looks like you included the solos from last week. For instance, Jess did not do Broadway between Contemporary and Rumba. Contemporary was his assigned dance last week, Broadway was his solo, and Rumba was this week.
Sasha's dances seem off. I'm not counting the group dances or the top 10 when everyone did a solo, because I think the issue is the "luck" of the draw . She has had: Contemporary (top-20), Hip-Hop (top-20 redux), Contemporary (16), Hip Hop, (14), Paso Doble (12), Jazz (12), Hip Hop (10), Quickstep (8), Jazz (8). So she has had Contemporary twice, Jazz twice, Hip Hop three times, Latin (Paso), and Ballroom (Quickstep).
Compare that with Melanie's "luck": Contemporary (20), Jazz (20), Lyrical Hip Hop (16), Jazz (14), Tango (12), Contemporary (12), Viennese Waltz (10), Contemporary (8), Jazz (8). So that's three Contemporary, three Jazz, one Lyrical Hip Hop, one Latin (Tango), and one Ballroom (Viennese Waltz -- with no dance holds).
And ITA with genevieve that Contemporary and Jazz are pretty much the same. If you do that, it means that Melanie has had six in her genre compared to four for Sasha, not to mention that Melanie's Viennese Waltz was basically a contemporary. Could Melanie do a real hip hop number? Or an actual ballroom that requires her to dance backward in heels in a close hold?
As for Marco, his "luck' has been overlooked. He's had Contemporary (20), Jazz (20), Lyrical Hip Hop (16), Jazz (14), Tango (12), Contemporary (12), Samba (10), Contemporary (8), Hip Hop (8). That's three Contemporary, two Jazz, two Latin (Tango and Samba), one Lyrical Hip Hop and one Hip Hop.
Oh, and I'm bitter about losing Jess, who, despite his height, proved to be the most versatile guy, imo. He only danced in "his" style once during the performance shows, and that was his very first week. He had: Broadway (20), Contemporary (20), Foxtrot (16), Contemporary (14), Lyrical Hip Hop (12), Jive (12), Contemporary (10), Hip Hip (8), Rumba (8). So that's three Contemporary, two Latin (Jive and Rumba), and on each of Broadway, Ballroom (Foxtrot), Lyrical Hip Hop and Hip Hop.