We were trying to use DisplayPosition of StoreItems in our app but it's always coming down as null. When we download the json from the management console we notice it's still null. This seems weird since the UI lets us drag things into a different order, but that apparently doesn't propagate to "DisplayPosition". When we download the json and then modify the 'null' values to be the proper displayposition values, it won't accept an upload of the json file saying "Failed to deserialize". Any help with this would be appreciated, it'd be a lot of overkill to have to do raw http admin calls just to get around this.