I seem to have unearthed a bug in the Kendo spreadsheet control. When the spreadsheet has only 1 row and there is column validation somewhere on the sheet, if I then edit a cell (without validation), 8 rows are created.
See the following Dojo
Steps to reproduce.
1. Run the Dojo
2. Edit the UnitPrice cell to, say 20
3. Save changes
4. Observe in the browser console (F12) 8 rows created.
Expected results are 0 rows created and 1 updated