Hi,
For the logo, this is normal behavior. Helix Ultimate generates the srcset automatically. Since you currently have only the main logo added, it shows as 1x. If additional logo sizes (e.g., retina versions) are provided, they will be included there.
Screenshot: https://imgur.com/a/kyST2gI
Also for edit button, it only appear if you have front end admin login, normal visitor or user will not see this.
Regarding the menu issue, it appears to be caused by CSS on the site. Please add the following CSS to:
/templates/shadvintech/css/custom.css
body:not(.itemid-101) section#sp-section-1 {
margin-top: -64px;
padding-top: 64px;
}
After adding it, please clear both your Joomla cache and browser cache.
If you encounter any issues while saving the CSS, you may need to temporarily disable ModSecurity on your hosting server. If everything saves fine, you can ignore this step.
Thanks!