Yes, each E-junkie account that uses PayPal for checkout needs to have its own, unique PayPal Email entered in its profile, as that's how our system determines which seller account goes with each payment notification we receive from PayPal. These PayPal Emails can be either the email address you use to log into PayPal or secondary emails you've added to the same actual PayPal account, and we'd recommend verifying that you have Confirmed those emails with PayPal as well:
https://www.paypal.com/webapps/helpcenter/article/?solutionId=12757&m=SRE
Each E-junkie account you use for selling needs to have its own subscription payment plan keeping the account's seller functions active. We can offer a discount on multiple accounts to ensure that you are not overpaying for the total products/space capacity of those accounts combined -- e.g., if you had 4 accounts each subscribed at our $5/mo level allowing up to 10 products sharing up to 50 MB, that would amount to a combined capacity of 40 products and 200 MB of space, which would otherwise fit within our $15/mo plan, so we could set up a discount to make sure you're only paying us $15/mo instead of $20/mo.