Starting with the .NET Framework 4 the paths of GAC are changed, here a brief summary.
When you add more than one list to a feature we need to change the Type and the TemplateType from elements.xml files,
otherwise the second list get the first template.
In this example I haved changed the default to 10001
and the other file
When you are developing a plugin office our settings should be saved in the app.config, but unfortunately this results in Excel.exe.config, Winword.exe.config, etc..
To solve this problem simply create a new .config file with the following name:
Visual Studio will create a new file called <pluginname>.dll.config and this is what our plugin will read, as evidenced by the following statement
Remember to set up file property to "Copy to output directory"
See MSDN page