Pictures in page stay as the template "Realtor" pictures after logging out?

Hi. I am using template "Realtor" for starting building a new site. I changed pictures in the homepage but it remains the same as template page dispalying.
I don't know why. Cache is cleared.

Below is the url:
https://bwoohk.com/

When I log into the site for editing, pictures on displaying recover to those ones I replaced...

Can you let me know why and how to fix it? Thanks!