Question 1: There are 2 emails configured in my account and both are added into woocommerce accordingly. One of my customers place order on my secondary website but in the order was automatically status changed to on-hold and there was a message showing to me in order details was "Validation error: PayPal IPN response from a different email address".
Question 2: On checkout page client will view my primary address. For example if the client is paying me on the secondary website then PayPal will show my primary site email address.
I don't want to show any kind of material of my Primary website to my secondary website clients.