On my submissions, how can I see who has paid?

ive got 20 submissions but onlyshowing 9 received through paypal.  Is there a delay between postings?

You can identify if the user paid or not on the Submissions page. The product field will appear that shows the amount if the user paid. Here's a screenshot:

I recommend you to wait for the transaction to appear in your PayPal.

Let us know if the issue is still the same. Thank you.