AD@UMD of MS and AD@UMass of PHD

UMass申请的PHD，12月28给的Conditional Admit，意思是只要能毕业就要，至今没套磁。
另一个是迷你苏大双城UMD申请的MS,前天邮件,具体如下
Congratulations on your admission to the Electrical Engineering M S E E program beginning Fall 2014.

Please inform us if you are accepting our offer of admission by completing our 1point3acres.com. If you wish to complete the Enrollment Form later, then at that time login to https://app.applyyourself.com/?id=UMN-GRAD with your PIN and password to access your admission letter and link to the Enrollment Form. Your admission letter is posted permanently.
然后下面一堆手续，令我费解的是，为什么这个学校master还分导师了，虽然申请时有这项内容，但是感觉大部分学校master不是没有指明老板么，有没有人指导下。