Hi oanhtran1804,
We are very sorry for delay reply because we do not work at the weekend, hope you understand for us.
- Issue 1: We are very sorry when hearing that. Could you please send us your admin login via 'secret information'? We would like to check directly on your site then show you how to solve your problem.
- issue 2: You can consult our documentations or video clips in http://themeforest.net. It is easy to configure. If you have any question, please contact us. We will help you as soon as possible.
- issue 3: If you want customize your theme, you need to install the child theme, or not. And the PSD file, it only is the theme demo.
NOTE: We think you better limit your line by line questions, it's made hard for us to manage all of the queries within this forum, hope you understand us. For easier way, you can list all your questions in a document file and attach it here, we will answer you as soon as possible.
We will close all the other ticket and reply you follow this ticket.
Thank you.