Hi.,
Sorry for the inconvenience ,
1 ) We will try to fix this image size issue based on device in our next update.
2 ) Google updated few algorithms, so it shows 1 mark only. When theme approved it’s around 70 / 100. Because Themeforest asked to improve. After reach 70 only, they will approve our theme .We needs to improve the speed for mobile devices. We will update this ASAP!!