Looks like the issue is with the way private keys were generated.
you use an airgapped system correct? if you are using a system that is online, then all your coins are at risk and you need to cease selling any coins and recall all of them - I hope it is not this serious and I am not sure if it was, that you would say so.
Considering your statements on how your keys are generated when previously asked:
Following all the suggestions, we are buying a one time only Printer for printing keys (wired) and one time use-only computer for creating keys.
Thanks
Team RC
so if it is a one use system, was it online? did you lose control of it?