           else
             # iterate over parcel instances
             _.each _.keys(deliveryDiff.parcels), (parcelIndex) ->
-              if parcelIndex != '_t'
+              if parcelIndex  isnt '_t'
                 parcelDiff = deliveryDiff.parcels[parcelIndex]
 
                 if _.isArray parcelDiff

    if returnInfoDiffs
      # iterate over returnInfo instances
      _.each _.keys(returnInfoDiffs), (returnInfoIndex) ->
        if returnInfoIndex != '_t'
          returnInfoDiff = returnInfoDiffs[returnInfoIndex]
          if _.isArray returnInfoDiff
            # returnInfo was added

            returnInfo = returnInfoDiff
            # iterate over returnInfo items instances
            _.each _.keys(returnInfo.items), (returnInfoItemIndex) ->
              if returnInfoItemIndex isnt '_t'
                returnInfoItem = returnInfo.items[returnInfoItemIndex]
                # iterate over all returnInfo status actions
                _.each actionsListReturnInfoState(), (actionDefinition) ->
