you need another pin. The last bit latches so you can not run these in series like that.
Split the enable pins to direct the serial data stream to one or the other. If you do not want to use another pin you can put an inverter between them.
Great! I don't expect the parts in the mail sooner than Monday and I have to get this project done by Christmas. I'm going to go ahead and start writing the code, probably in assembly. So there's a goo chance I'll be posting about my code in the next few days.