The entire programming team has double checked, and we can't find any descrepancies between the data type we flatten out and send on the robot and the data type we unflatten in the dashboard.
If it helps, here's a screenshot of the error
http://i.imgur.com/BjkUZ.png (sorry, not very much relivant code is in view; we have to be with the robot to get the error and we have no internet where the robot is)
Thanks again for helping with this problem!