from what i know ...back when i was in college it was okay for an international student to work 40hrs a week on campus during summer time provided they had taken at least 1 credit summer class... however i do not know if the laws have changed regarding the work specification for the international students, in the event that it has not there should be no problem...and from what you have told me i think this international advisor is just trying to give you guys a hard time. if you can talk to an immigration lawyer or search online for help. i would suggest USCIS.gov or Murthy.com