Hello,
At first, please check this link http://docs.thememiles.com/web-log.
1. To hide author please go to Appearance-> Customize then go to weblog theme option then check the post setting. http://prntscr.com/t81vyt
2. To remove this orange box, go to Appearance-> Customize then go to weblog theme option then check Breadcrumb Options. http://prntscr.com/t81wxb
If you need help feel free to contact us.
Thank you