Duplicate Users When Moving From WP.Com

Recently I moved my blog from wordpress.com to ww.wp.xz.cn, hosted by Bluehost. I exported it and imported it using guidance from WPbeginner.com (https://www.wpbeginner.com/wp-tutorials/how-to-properly-move-your-blog-from-wordpress-com-to-wordpress-org/)

During the import/export process, I was confused by the authors/users setup and obviously did something wrong—I am the only author on my blog, yet I accidentally created a duplicate user who is listed as the author of all my imported posts, but the other one is the one linked to Jetpack and I don’t know if that will cause any issues. (I’m not a techie so really relying heavily on guidance.) At the least it’s confusing for me to manage. I have set it so they are both Administrators but would really prefer to be able to have just the one user.