Checkout Issues With Paypal

I have been having a couple issues with checkout:

1. Payments being received but orders not showing up or being recorded. 

2. Orders going through but charging the client 2 or 3 times - which results in me having to refund.

I checked my PayPal developer dashboard and have no errors.

A couple of other users have been having the same issue and I can not reproduce it or figure out why.

Have you been successfully using PayPal checkout and this started recently or are you just starting to use it?

If you can EMAIL me access to your HOSTING control panel or FTP, I'd like to set up some logging.

Yes, I'm finding that payments are being received, but orders are not showing up and clients (and indeed myself) are not receiving order confirmation emails. 

UPDATE. One of my two affected orders is OK now.

Have you been using PayPal Checkout for a while and this just started? Or are you just starting to use it?

Been using PayPal with Sytist / Photocard since the beginning with no problems. One of my two orders that was affected appears to be OK now, as I've just received an order confirmation. The other one still hasn't confirmed the order.

PayPal Standard Business or PayPal Checkout? (You can look in Settings -> Checkout & Payment).

This post is about "PayPal Checkout". 

If it is PayPal Standard Business then it is probably just delayed. But see: Customer Paid By PayPal But No Order Created