What if instead of creating the demo file from scratch, create it from your regular template file by deleting all but the layers etc. needed to create your demo plan.
This should retain the index numbers, layers and layer combinations. This also eliminates errors from [my] poor typing and spelling.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"