Hello julia,
First we request you to update the theme on the latest version. Before updating the theme, keep the files and database backup as well. This theme have one click updates available. So make sure you added the license on your site. If you don’t have look this blog post to know how to set the theme license on theme. And you need to know the Child Theme and its Importance as well before updating the theme.
Let us know if you have any confusion.
Add the below css codes on Appearance > Customize > Additional CSS
1. Removing date:
.content-wrapper .entry-header {
display: none;
}2. For Weird Column.
.navbar-header {
position: absolute;
z-index: 1;
}Hope the above provided CSS will solve your problem.
Warm Regards
Acme Supports