Web farm error "Invalid URI: The format of the URI could not be determined."

Hi,

I'm setting up a web farm with two load balanced web servers. I want Kentico to generate the servers automatically so I have the following web.config settings on both servers:

<add key="CMSURLPort" value="80" />
<add key="CMSWebFarmGenerateServers" value="true" />
<add key="CMSWebFarmUseDBUpdater" value="true" />

In Kentico my settings are:

I can see both servers have auto-created in the Web Farm module. However, my Event Log is reporting a lot of errors (source: Web Farm) like this:

Message: Invalid URI: The format of the URI could not be determined.

Exception type: System.UriFormatException
Stack Trace:
at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
at CMS.WebFarmSync.UrlWebFarmUpdater.Notify(String url)

When I look at the auto-generated settings for each web farm server I see that the "Server root URL" looks like this: 10.123.123.1/. I know that if I was setting these servers up myself then this URL would have to be a proper URL e.g. http://10.123.123.1/. If I change this value to add the http:// prefix then the errors seem to go away, but now I'm getting license limitation warnings because I haven't added licenses for these internal IP URLs (and don't want to because I want to be confident my setup will work automatically if I add an additional web server to the load balanced set).

After all this I'm looking for answers to 2 questions:

1. Why are these servers being auto-generated with values that cause Kentico errors to be logged
2. Why are these URLs even being used

I hope can help. Thanks in advance.