We setup our main MultiSite blogs as http://blogs.ntu.edu.sg. And the site blogs to be http://blogs.ntu.edu.sg/xxx , where xxx is the blogs name. or it can even be http://blogs.ntu.edu.sg/yyy/xxx, where yyy is a group name.
We like to used this Domain Mapping and give
http://blogs.ntu.edu.sg/schoolofengineering/it-depart to become http://it-dept.edu.sg.
We have set accordingly to the instruction. But, we found out, http://blogs.ntu.edu.sg/schoolofengineering/mechanical-depart or even http://blogs.ntu.edu.sg/administration are affect and become broken site.
We need advice on where has we gone wrong.