I am not sure if I understand correctly the issue. Since you are using an Ajax form, an Ajax request should be made and the page should not be redirected. Could you provide the code you are using so I can check the setup?
If you need to reload the page and navigate to the same Grid page then you could include a route value to the request with a name in the format Grid Name plus "-page" that has the current page as value. The Grid should automatically apply it.
the Telerik team
Join us on our journey to create the world's most complete HTML 5 UI Framework - download Kendo UI