The overall rating reflects the current state of the app. It accounts for all app reviews but prioritizes the most recent ones.
This app was buggy for me. It wouldn't load and I couldn't even save my first raffle. I tried refreshing and logging out/in to no avail.
I apologize for the issue you had here. I am always available via "email@example.com" to investigate a problem and determine its cause and/or any change I can make.