Unfortunately for you, I think VMware would expect that an administrator who is at the level of VCAP-DCA should appreciate the potential implications of removing uplinks from virtual switches. Yes mistakes can happen, and yes it was not a lab environment you were fully familiar with, but you are presented with the same lab and tasks as every other person who attempts the DCA exam.
Hopefully for you, you were still able to complete enough tasks to gain enough points to pass. Best of luck!
Scott.