Creating a map with unique picture symbols for multiple different data layers, i created all pictures in Illustrator then exported as .emf files then changed symbology in arcmap to picture symbol for each layer. In arcmap it works, all points are being represented by their respective picture symbols. When i then export map back to Ai, some of the symbols embed into the map and others do not. Is there a way to fix this? why do some of the layers in arcmap export into individual layers in Ai and are fully editable, yet some of the exact same files with different symbols do not?