The KendoUI grid widget is part of Telerik's KendoUI.
In order for the Kendo UI grid to be properly created, when changing item count you need to use the Kendo UI destroy() method and jQuery empty() to destroy, remove the old grid/html, and then re-create the same grid with the new different data (more details here: http://codylindley.github.io/the-kendo-ui-book/#5.12-Destroying-widgets).