关于ASEE里数据的问题

最近看ASEE的时候 无意间发现 有个数据有问题啊 不知道是不是我看的方法不对
拿CMU做例子吧
New Graduate Applicants 里会显示

A. Number of graduate applicants to the engineering college:	6,034
B. Of those in (A), how many were offered admission?	1,755
C. Of those in (B), how many were enrolled in the fall?	886

但是Enrollments by Class里
MS Fulltime 和partime enrolled的总人数分别是 589和197
PHD Fulltime 和partime enrolled的总人数分别是 650和31
这4个数字怎么也加不出886和1755啊
ASEE上基本每个学校都是这样
求解释 我哪里理解错了吗