Office 2007 GPO installation

Good day all

I have been testing out a gpo installation of office 2007 with mixed results:
1. After formatting and re installing OS it installs fine.
2. After the same as above it just installs the office tools and sets office to install at first use.
3. Same as above but always configures office on first use.
4. Removes already installed Office 2007 and doesn’t reinstall.

My apologies I neglected to ask the question, what could be causing this, is there something I am missing. I should also mention that it worked fine when it was part of the default domain policy, then I created a separate gp for it and then it started acting like this.