Hi Jonathan,
The attached sample implements the ListWrapper class to avoid the 'jumps' while the user changes the value in a sorted column. It also support the multicolumn sorting in a grid. Please try this and let me know if this helps.
Here is a sample.
http://www.syncfusion.com/Support/user/uploads/WrapperClassSortSample_46fcd2f1.zipBest Regards,
Nagaraj