Issue with nuget config transformation files - nuget

Question

I am creating a nuget package that besides other files contains also configuration files such as: f1.config, f2.config etc. These configuration files are in turn referenced in the web.config file.
As these configuration files may or may not exist in the project where this package would be installed, I have renamed them to f1.config.transform, f2.config.transform.
While the installation of the package runs flawlessly in all possible scenarios, uninstalling is not working as expected in one particular case. Namely, if let say the config file f2.config did not exist in the project before the installation, it will not be removed when uninstalling the package.
Any ideas?
EDIT: NuGet spec file
<?xml version="1.0" encoding="utf-8"?>
<package xmlns="http://schemas.microsoft.com/packaging/2011/08/nuspec.xsd">
<metadata>
<id>WCFServicesProxyPackage</id>
<version>1.0.3</version>
<title />
<authors>Shkelzen a. Saraqini</authors>
<owners>Shkelzen a. Saraqini</owners>
<requireLicenseAcceptance>false</requireLicenseAcceptance>
<description>WCF services proxy package.</description>
<language>en-CA</language>
<references>
<reference file="WCFServices.Proxy.dll" />
</references>
</metadata>
<files>
<file src="content\config\system.serviceModel.behaviors.Local.config.transform" target="content\config\system.serviceModel.behaviors.Local.config.transform" />
<file src="content\config\system.serviceModel.behaviors.Production.config.transform" target="content\config\system.serviceModel.behaviors.Production.config.transform" />
<file src="content\config\system.serviceModel.behaviors.QA.config.transform" target="content\config\system.serviceModel.behaviors.QA.config.transform" />
<file src="content\config\system.serviceModel.bindings.Local.config.transform" target="content\config\system.serviceModel.bindings.Local.config.transform" />
<file src="content\config\system.serviceModel.bindings.Production.config.transform" target="content\config\system.serviceModel.bindings.Production.config.transform" />
<file src="content\config\system.serviceModel.bindings.QA.config.transform" target="content\config\system.serviceModel.bindings.QA.config.transform" />
<file src="content\config\system.serviceModel.client.Local.config.transform" target="content\config\system.serviceModel.client.Local.config.transform" />
<file src="content\config\system.serviceModel.client.Production.config.transform" target="content\config\system.serviceModel.client.Production.config.transform" />
<file src="content\config\system.serviceModel.client.QA.config.transform" target="content\config\system.serviceModel.client.QA.config.transform" />
<file src="content\Web.config.transform" target="content\Web.config.transform" />
<file src="lib\net40\WCFServices.Proxy.dll" target="lib\net40\WCFServices.Proxy.dll" />
</files>
</package>

Answer 1

How do you install/uninstall the config files? Could you share some PowerShell snippets from your scripts (assuming you're using PowerShell install.ps1/uninstall.ps1 scripts in your package)?
Maybe you can force the removal of the files: http://www.timvw.be/2011/10/18/force-the-removal-of-a-file-with-powershell/
Also, it is likely this functionality will be improved in the future, if and when XDT becomes OSS for NuGet to benefit from it.