There is a slight issue with paging from the first hotkey bar page when clicking the left arrow or using Grave and SHIFT+grave to page left and right respectively.
Whenever the very first page is the active hotkey bar page, clicking the left arrow or pressing the grave key doesn't page it to the second page unless I click or press that key again. This does not happen the other way around unless I click or press SHIFT+grave twice. It is as if the first page is being duplicated to a "phantom" page that comes before CTRL+1 (the keybind for quickly paging to the first hotkey bar page).
I double-checked by changing out an item/justu on the first page and by testing CTRL+1-12 (0, -. = are what I'm calling 10, 11, and 12). Every change I made to the first page's bar was duplicated to the "phantom" page, and I could not access that "phantom" page via CTRL+1-12.