It is a bad idea to ask your customers to send bitcoin to your hot wallet. In this case, the amount of hot bitcoin could not be controlled and it is difficult to manage the risk.
Bitcoin should be sent to a cold wallet, and manually replenish the hot wallet if needed.
Bitcoin should be sent to a cold wallet, and manually replenish the hot wallet if needed.
this ^.
Seems they have it backwards.
Yes, but if it's a bug in the way keys are handled, then the cold wallet could end up with the same problem and it's a much larger problem at that point. Something simple like a flipped bit can cause this.
