Yes, I noticed this reversal at the time and found it confusing -- one day the RCMP were not investigating old cases and the next day they were, yet the second story didn't explain the change or  refer to the first one.  
That said, however, I can understand why your reporters wrote the first story the way they did -- the RCMP bafflegab responses to your reporters certainly left the impression that they actually did NOT intend to review the previous cases.