Old servers redirect to new server after creation

I have ~15 sites running in Virtualmin … and I’m creating a new server to run SoCalBeepBaseball.org.

When I create the new server, web traffic for any of the other sites is redirected through this new domain.

When I delete the server for SoCalBeepBaseball.org … everything returns to normal.

What config file is getting goofy - and why?