Did you confirm the return code template in your office 2010 package contains the 3010 code?
Yes, the default non MSI Template is applied and the 3010 return code is there with the type set to Success.
What type of delivery method are you using? Is it using "Run from source" in the Network Usage section?
If so, it's probably not copying down the taskmanifest file which contains the return code mapping. Give support a call and they can get a patch to you for that issue. Or you can change it to tha Download from source delivery method.