calc pace bug?

Sometimes when I load a workout (manually or Garmin upload) I get the calulated pace and it's one thing, say 8:00.  Then I save and when I view on my blog it's 8:01.  Go back to training page, it says 8:01, I hit calc pace again and it goes back to 8:00.  Then save and view in blog and it's 8:01 again.  If I'm feeling anal, I'll lower my time by a second or two and it fixes the issue.  If I have Garmin data, the lower time is what matches my Garmin watch data.

Very minor, and i only care if I'm being excessively anal, but just thought you guys may want a heads up.