Singelsite WP, anchors do not work in the menu from other than the main page

Yesterday I started using the blocksy theme. There is a menu in the header. Items desktop, server router, virtualization and contact use an anchor within the main page (singlesite). Then in the menu there are 2 links away from the main page (blog and speedmeter). Within singlesite, the desktop, server router, virtualization and contact links work perfectly.

e.g

mysite/#desktop
mysite/#router
etc

If I click on the blog and want to go to the desktop again, the link doesn’t work, because it goes to mysite/blog/#desktop. How could I solve this problem?

I apologize, but the website is not in English

The page I need help with: [log in to see the link]