This is a critical issue for many people (who wants to enter 24 variations for 30 products manually?). I am surprised you didn’t fix this immediately. I have spent 30 min with this issue and luckily I found your temporary solution.
Cheers
To merge the two fields, go to the ‘admin’ Post title and check the option “Create content template”. Then select the ‘public’ Post title field as the template e.g. for me it is: {Ad Title:1}
You can also add the following code to your functions.php file in order to remove the effect of option “Number of Posts displayed on Archive pages” of the elegant theme on “Products per page” setting of this plugin:
remove_action( 'pre_get_posts', 'et_custom_posts_per_page' );
