I just noticed yesterday that I had the same thing happen.  On April 11th there was a $4,632 (plus tax) charge to my credit card for what should have been only $184.  I called the number that was next to the charge on my credit card statement.  I ended up talking to someone who acknowledged that there is a glitch due to the switch to the new process.  He was able to look at the PPR audit report and see the overcharge.  They then walked me through the process of sending them a copy of the audit report which he said will result in a refund to my credit card in about 5 to 7 days.  The whole process took me about a half hour.