The pasted walls have the various display definitions that you set for the original wall so they won't show if on the story you paste them to they aren't set to show.
I'm not sure whether this is a bug or a feature.
I've often wished the pasted elements would automatically change their homestory and other display settings relative to the story it is being pasted to or better still have the option to make that choice.
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"