New Post: multi-server farm installation - installation only runs on one server

I'm running an offline/remote install of SP2013 on Windows Server 2012. This is a two Server farm.
SharePoint is getting installed on the first Server but there's nothing installed on the second Server. I'm using the Provision="SP-1 SP-2" to define which Server should be used for which Service app.
Both Servers are in the $farmServers variable and I can't find any error.

Any ideas?

thanks