for example the article titled "Come il marketing può aumentare i clienti per un avvocato o per uno studio legale" was to be published at 7.43 but instead went online at 10.05 am

May i know do you have setup cronjob on your server?

Because it required cronjob to keep execute the script to check whether your site got schedule post ready to publish or not.

If you need assistance to help you setup cronjob on your server, can you provide us with your Cpanel access so we can help you setup on this?

no, I have not set it, you tell me which url should I set in the cron? and how often?

You can refer on our documentation here : https://stackideas.com/docs/easyblog/administrators/cronjobs

Make sure you setup that cron is work properly on your server, if you need help on this, you can provide us with your Cpanel access so I can assist you on this.

if you already setup the cronjob on your server, you have to turn off this 'Send E-mails During Page Load' setting from backend, you can check my attached screenshot below.