I wasn't able to replicate the issue you are experiencing on my side. However I managed to apply the demo configuration of Grid PDF export with TemplateId and RepeatHeaders to a new MVC project successfully. What I would suggest you as a starting point is to use the built in Visual Studio "Grid and Menu" project template for example and apply the PDF demo
setup over it. I'm attaching a sample of this approach for your convenience.
Here is the result on my end: http://screencast.com/t/QH2XyAunSkhQ
I hope you will find this information useful.
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