That's not necessarily a problem. Sometimes, the reflex may be to classify something that isn't necessarily secret. These are things that we deal with on a regular basis. The “secret” clearance is a good example.
Going back to your example of the Winnipeg lab, I think it's also important to note that it's sometimes easier to make certain information public when the risk has been mitigated. This was a major factor in the new disclosure in the Winnipeg lab file.