We are having issues losing cell edits when using Sortables with Grids. Kendos own Sortable+Grid demo shows the issue if you switch on editable:
http://demos.telerik.com/kendo-ui/sortable/integration-grid
Here is the same demo with editable switched on:
http://dojo.telerik.com/EFEVE
To reproduce the problem click in a cell and edit it, then click in another cell. The edits you made in the first cell will be lost.
If you disable the Sortable then this issue doesn't occur.