By assigning labels to a specific printer in your Clover printer settings, you can ensure that items with those labels will always fire to that printer.
We recommend having a kiosk label for all items you display in Order Kiosk and then adding that label to your Kitchen Printer. Those items with the kiosk label will always print to the kitchen printer when ordered through Order Kiosk.
Here are some further instructions on linking labels to printers.
Also make sure you are selecting the right labels and categories when launching your Order Kiosk.