Is it possible to provide me with ftp access again to make changes to the stec.js file?

Or if you want to make them by yourself you could open file 

plugins\stachethemes_event_calendar\front\js\stec.js

on line 5847 you should see this code:

            sortByFeatured: function (a, b) {
                if (a.featured != 0 && b.featured != 0) {
                    return a.start_date_timestamp - b.start_date_timestamp;
                } else {
                    return b.featured - a.featured;
                }
            },

Change it to:

            sortByFeatured: function (a, b) {
                
                if (a.featured != 0 && b.featured != 0) {
                    return a.start_date_timestamp - b.start_date_timestamp;
                } else {
                    return (Math.abs(b.featured - a.featured) != 0 ? b.featured - a.featured : -1);
                }
            },