Hello, @mrv63,
For the sticky header if you just want to change for mobile you can simply use the below CSS code in the Porto >> Theme Options >> skins >> Custom CSS.
@media(max-width:575px){.header-reveal #header.sticky-header .header-main.sticky{padding-top:15px !important;}}
Regarding the labels you are using a third-party plugin that I confirmed is not included in our compatible plugin list. By default, our theme provides the product label options in the Porto >> theme options >> woocommerce >> check this screenshot: https://postimg.cc/K3kk7xdz you can use the theme feature, else using the plugin requires additional customization that we cannot cover in our support policy. You can contact our customization team at: https://www.portotheme.com/customization/ I hope you can understand.
Best Regards,
PThemes Team.
