Don't worry, just go back to their website:
http://www1.carleton.ca/socialwork/2013/2013-14-msw-applicants-admissions-decisions
it said that:
Some of you may have noticed that this status has changed to “Review in Progress by Department“. This means all offers need final approval of the Faculty of Graduate and Post-Doctoral Affairs (FGPA) before they can be sent to successful applicants.