Here's some facts (and an opinion or two) that might help clear things up.
Normal female T levels = 0.52 - 2.4 nmol/L
http://www.emedicinehealth.com/script/main/art.asp?articlekey=129553
Normal male T levels = 9 - 38 nmol/L Same source
The 99th percentile for T concentration among women Olympians is 3.08 nmol/L - See more at:
http://press.endocrine.org/doi/abs/10.1210/jc.2014-1391#sthash.ci2CERnX.dpuf
Semenya was rumored to have T-level 3x higher than the *highest* female athletes. However we can assume she was higher than 9, because when the IAAF required that she reduce T levels to below 10 nmol/L, her times became pedestrian. When that rule was struck down, her times returned to world class.
Opinion: What this means is when Castor was forced to reduce her testosterone to 10 nmol/L... higher than any female ever tested... she was not competitive.
Thus, she has an unfair advantage over non-intersex and should not be allowed to run in the female category until she chemically or surgically reduces her T levels to that of a woman.