Hi There,
Don’t worry about the child theme image, that can be anything actually. And also the redirecting to Pro > Overview when you switch to Pro or pro-child is just normal.
Now regarding to your child theme styling issue, was it a custom CSS that is not working? or is the site overall styling is kind of mess up? If it is the later, please clear any caching plugin and feature the site might have. especially a CDN caching (like CloudFlare) or internal caching from your hosting provider. To make sure that your site is serving you the latest/updated files. And your browser’s cache too, please clear it.
Another thing can you confirm that you have this line on your child theme’s functions.php file?
add_filter( 'x_enqueue_parent_stylesheet', '__return_true' );
If it does not exist please add it.
If this does not resolve the issue, please provide us login credentials in “Secure note” so we can take a closer look.
Cheers!