Unable to add new SharePoint 2010 server to farm due to missing products and patches when service pack 1 media is used.

Recently I built a new SharePoint 2010 server and attempted to add it to an existing farm.  The original servers were all setup on the original pre-SP1 media and then updated organically while for the new server I opted to use the latest media for sharepoint and office web apps which comes with SP1.

The install went through fine with no errors however on attempting to join the farm I was prompted to install many products and patches.

Curiously the same update is listed twice for different build numbers and installing the update only satisfies one of the build numbers listed in the check.  In addition to this a number of language packs are all listed as missing locally with the build number 14.0.6029.1000 despite none of these actually being installed on the original existing servers.

The full list of items:

Microsoft SharePoint Server 2010 Installed Across Server Farm 

Microsoft SharePoint Foundation 2010 1033 Lang Pack

Update for Microsoft SharePoint Foundation 2010 (KB2553014) (14.0.6106.5000)
Missing on xxxx
Missing Locally
Update for Microsoft SharePoint Foundation 2010 (KB2553014) (14.0.6109.5000)
Missing on xxxx
Missing on xxxx
Microsoft SharePoint Portal

Security Update for Microsoft SharePoint Server 2010 (KB2494022) (14.0.6106.5001)
Missing on xxxx
Microsoft Shared Components

Security Update for Microsoft SharePoint Server 2010 (KB2560885) (14.0.6106.5001)
Missing on xxxx
Missing on xxxx
Microsoft Word Server

Update for Microsoft Sharepoint Server 2010 (KB2553132) 64-Bit Edition (14.0.6108.5000)
Missing on xxxx
Missing on xxxx
PerformancePoint Services for SharePoint

Security Update for Microsoft SharePoint Server 2010 (KB2566456) (14.0.6106.5001)
Missing on xxxx
Missing on xxxx
PerformancePoint Services in SharePoint 1033 Language Pack

Security Update for Microsoft SharePoint Server 2010 (KB2566958) (14.0.6106.5001)
Missing on xxxx
Missing on xxxx
Microsoft Document Lifecycle Components

Security Update for Microsoft SharePoint Server 2010 (KB2566954) (14.0.6106.5001)
Missing on xxxx
Missing on xxxx
Microsoft Office Server Proof (Arabic) 2010

Microsoft Office Server Proof (Arabic) 2010 (14.0.6029.1000)
Missing Locally
Microsoft SharePoint 2010 Service Pack 1 (SP1) (14.0.6029.1000)
Missing Locally
Microsoft Office Server Proof (German) 2010

Microsoft Office Server Proof (German) 2010 (14.0.6029.1000)
Missing Locally
Microsoft SharePoint 2010 Service Pack 1 (SP1) (14.0.6029.1000)
Missing Locally
Microsoft Office Server Proof (French) 2010

Microsoft Office Server Proof (French) 2010 (14.0.6029.1000)
Missing Locally
Microsoft SharePoint 2010 Service Pack 1 (SP1) (14.0.6029.1000)
Missing Locally
Microsoft Office Server Proof (Russian) 2010

Microsoft Office Server Proof (Russian) 2010 (14.0.6029.1000)
Missing Locally
Microsoft SharePoint 2010 Service Pack 1 (SP1) (14.0.6029.1000)
Missing Locally
Microsoft Office Server Proof (Spanish) 2010

Microsoft Office Server Proof (Spanish) 2010 (14.0.6029.1000)
Missing Locally
Microsoft SharePoint 2010 Service Pack 1 (SP1) (14.0.6029.1000)
Missing Locally
Microsoft® Office Web Apps Missing Locally

All in all it looks to me like the slipstreamed sp1 media contains a number of old/broken files.

I ended up completely removing both SharePoint 2010 and office web apps from the new server and then installing the products again from the original pre-sp1 media and then updating to sp1 manually.  This had the desired effect and the odd missing updates for unexpected build numbers and missing language packs were all gone and the new server joined the farm as it should without issue.