Hi and so sorry ya are having to go threw this, i would not do anything till i talk to his Dr. he needs to know whats going on and can let you know how safe that would be.
Talk to the pharmacist. See if it is safe to put two patches on, and make sure, as well, that they are not left on by accident as it may be harder to manage two separate patches. So as long as the caregiver is aware of the location and good about changing both on time...