I was not setting a model for the data, that did prevent the error message. I was asking about an unordered list not the grid, but I see if I want to reverse sort I may need to use a grid instead.
In JSON, what format should dates be in. If I query a date from Sql Server the JSON representation looks like this:
"Date\":\"\\/Date(1476750964337)\\/\"},
Should it be this or something like
...,\"Date\":\"Oct 17 2016 7:36PM\"},...