Domain Mapping not redirecting to primary domain

I noticed today that one of my WPMU sites is being redirected to the wrong domain.

I have several domains pointed to, the primary is set to, however for some reason is the domain that it redirects to.

I deleted and it started pointing to one of my other secondary domains, not I deleted and readded it and making certain that is set as primary and the system started pointing back to again.

Something isn't right here. I just hope its not affecting my other sites like this.