All the repeated orders will be made the same exactly as original files. 

For example, you have a completed order(Order number is W00002ASA1) and you repeat this order (the new order number is W00002ASA2), then the boards W00002ASA2 will use the same production files with order W00002ASA1. 

As we won't work on your original file to create new production file again, just use the same production file we made before for W00002ASA1 to make repeat order W00002ASA2. 

Only the PCB parameters(quantity /soldermask color/silkscreen color/surface finish/finished copper thickness）and the lead time of the boards can be changed. The gerber files cannot be changed.