There are be two possible reasons why a purchase may not show in a customer account.
The payment of the purchase may have not been fully completed yet, at least within JVZoo. If the information for some reason is not being sent back to JVZoo from PayPal, then JVZoo is unable to deliver the purchase at this point. In this case you will need to contact the seller's support desk directly to find out if they did receive the payment in their payment account. If so, they can set you up with access to their program already.
The other possible reason is that you may have created a new customer account by entering another email address or a typo into the contact/delivery email field on the checkout page, as this is what creates an additional customer account.
This may be the reason why not all of your purchases showing up all together in your customer portal. If you need assistance to find out under which account the product is, simply open a support ticket with us and provide us with the transaction details and with your receipt information.