wp_title, wp_content and wp-types

I defined a custom post type with wp-types plugin. Importing a simple file

post_title,post_content,post_slug
Title,Body,test-slug

results in post_title and post_content (“Title”, “Body”) getting put into custom fields called “post_title” and “post_content”. The post title and content are blank.

Any ideas?

Thanks.

https://wordpress.org/plugins/wp-ultimate-csv-importer/