First of all, I want you to know that my English is insufficient.
I had three questions.
1- As seen in the appendix, there is no space in your demo page, but the space on my demo page occurs.
2- How do I hide pictures on the same demo page, mobile view?
3- How do I access these page codes? http://demo.themelogi.com/wanium/portfolio/lamp-2/
3. You can see that portfolio item in your Dashboard > Portfolio > Lamp 2, as in the screenshot here:
If the problem persists, please share us the admin account of your site via private reply so we can investigate your case and help you out. Also, please point to specific page where we can see the problem.