Volley order used to matter (because sure that's more realistic), but that feature was changed as it forces extra micromanagement of weapons based on non-obvious variables, adding unnecessary complexity to the system while also interfering with the automated part sorting.
Technically there are already some other variables that might cause a desire to manually assign weapon order (hence the option in the config file to block weapon autosorting), though they're somewhat less important. Adding more variables to that equation would make manual weapon sorting almost required for even just semi-optimal play.
(And welcome to the forums!)