Is your time zone set correctly? I'm just wondering if it's already flipped over to the next day when you go in to enter your evening walk.
I just went into your account, found the favorites entry you mentioned and added 30 minutes for yesterday. Then I looked at the calories burned report for yesterday, and it looks correct. So I'm having trouble figuring out what could be the problem.
"You may have a fresh start any moment you choose, for this thing that we call "failure" is not the falling down but the staying down." Mary Pickford