The low expected yield rate of Class of 2021

Wait…that’s so weird. No, the CDS is the same as before.

Wesleyan here reports: 2129 admitted students and a 17.7% admit rate-http://www.wesleyan.edu/admission/apply/classprofile.html
But here, they report they took 1354 students and a 11.4% admit rate: http://www.wesleyan.edu/ir/data-sets/cds2016-17.pdf

Something is really off. Anyone have explanations? Because in one, the RD yield is 20%/36%, and in the other the yield is what I calculated above.