By design, WCF cannot have multiple IIS bindings. When using WCF you may see this error: "This collection already contains an address with scheme http"

To work around this, you can write a custom service factory to intercept and remove the other bindings being used or you can edit your web.config by specifying the address:

<serviceHostingEnvironment>

 <baseAddressPrefixFilters>
  <add prefix="http://mydomain.com"/>
 </baseAddressPrefixFilters>
</serviceHostingEnvironment>