mixed up HR data when two runs in same day

I've noticed this a couple times. If I do two runs in the same day, the heart rate pie chart data shows exactly the same for both, even tho I know one run was alot harder than the other.

If you look at my hr data from the two runs I did today (sept 10), you will see what i mean.
http://www.beginnertriathlete.com/discussion/training/index-weekly....

Both show mostly zone 1, but I know the 10 minute run was alot harder than the 2 minute run, so it should say mostly Zone 2 or 3. If you scroll down to see just the numbers, you can see that it is showing both runs at 2 minutes.