The calories figure looks kinda low for what those stats claim.
The emergency required to raise 80kg, 378m in elevation is 296kJ, or 70 dietary calories. The efficiency of the human body is roughly 25%. So for that elevation gain alone you need 280 calories; walking for two hours on flat terrain is probably itself ~600 calories.
Maybe the GPS was glitching on elevation gain? 379m over 9km is a relatively steep hill; really steep if you did a circuit and returned to where you started.
I was walking around a block in circles
On a hill or not?
slightly ? not exactly flat or that hilly either
I guess over two hours slight elevation gains adds up?
Looks like a bad GPS to me. Since you returned to where you started the uphill parts would have to average at least 8.5% grade, which is pretty steep for road. And since you travelled a significant distance in orthogonal axis it'd almost certainly have to be even steeper as the slope is unlikely to be at a 45° to the road network.
On a hill or not? Suspense is killing me
