No ! The redundant CPU is visible as one to Control Builder. You need to download the application (including HW configuration) only once - trough ethernet Control network. Of course, both CPU's have to be connected to the same control network.
Look the other post how to do controller reset. Most probably (depends on HW configuration) CI867 is connected to both CPU's trough BC810, so it will be controlled from the primary CPU. If there is switch-over to the backup CPU, it will be controlled from it.