My Nucleus banks in 8 channel increments. Shouldn't it be 16 channel increments?
The bank up and bank down messages that are generated when the Nucleus bank buttons are pressed, do not specify a number of channels. The choice of changing bank in 8 channel or 16 channel increments is controlled by the DAW. Some DAWs let you specify this.
The Nucleus manual mentions 16, but this is not always the case. At the time of writing, Steinberg's software DAWs (Cubase and Nuendo) use 8 channel increments.