Hi Sherry,
It appears that the SystemEmail is the sender address (i.e. the system's address that "sends" the notification emails).
The Harvard support address is hardcoded in SendFeedbackDialog.java as the default address, to be used if the context of the dialog is not a dataverse or dataset.
From your description I infer that the support link in the top 'menu' is a different context than the dataverse (which sounds reasonable to me, although maybe not for the top dataverse).
Ben