Domain mapping not working on media file URLs

I am setting up a new multisite network. I'm running into a strange issue - the media files aren't mapping to domains. So, I map a domain, and the domain maps, but the media files all still show the full path to the subdomain and wp-content folder. Like this

http://justinhandley.webmissioncontrol.com/wp-content/uploads/sites/10/2014/03/justin-round.png

instead of like this

http://justinhandley.com/files/2014/03/justin-round.png

Any idea why this would be happening? It is on all sites across the network.