Two domains mapped with domain mapping, one shows wrong URL

One multisite domain:
abq1.com is mapped to 505575.com/abq1. Works fine, abq1.com is the url that shows on load of website.
soundlikedrea.com is mapped to 505575.com/drea. Entering domain name pulls up correct website, but shows 505575.com /drea in the url.

Only diff I can find is the domain is mapped to soundslikedrea.com, while abq1.com is mapped to http://www.abq1.com. Both are parked, unassigned domains. Both have the correct A record and CNAME record, both have same setup in the settings in domain mapping.

How can I fix it so the url is correct? Do I have to delete the domain mapping? If so, how can I delete the mapping? I don't see a delete button anywhere except in the Site section. Do I have to delete the site?