2 membership sites...1 paypal

I have 2 membership sites, which i set up using the Amember software. However, in Paypal I have to put the sites IPN for each. But can only enter 1 site.

Is there a way around this? What happens to checkout on 1 site if the paypal ipn of the other site is entered?

If your sites use different prices but are hosted on the same account, you can set up the IPN to do different tasks depending on which price is being sent to you.