I can not answer the question about why PS3 is not showing me any errors.
I was amazed myself that PayPal was able to send me the error messages. Since I have not recieved any from PS3 myself.
As for deleting the files from the server and re-uploading them I did this twice yesterday and I did it again this morning. I am having the same problem.
I do not see an error message. Never have. The two errors 10419 and 10406 codes were given to me by PayPal. They were the ones that told me about that the "Payer ID is not being Passed".
All I know is PS3 is sending me messages that orders have been made and when I go to my PayPal Account and it is still setting at zero and I have received 12 or 15 orders this week but my account at PayPal is still at "zero".
Customers accounts have not been charged and money has not been transferred. PayPal is getting error messages but I am not.
I have not recieved any messages from PayPal that funds have been transferred.