Thanks for the replies, Does that mean all the on/off states of all the buttons will be lost in the presets that access them?
When copying, the states aren't lost exactly, but they're left on the previous page. So, if you copy from page 2 to page 3, the button states will remain on page 2, but will not be copied to page 3.
I had a quick look, and Swap Page will copy the button states, but Copy Page To/From will not. I will look into it and see if there's any particular reason why the latter doesn't. In the meantime, if you can use Swap Page, that should move the button states with the buttons.