I have done over two hundred of the shops you asked about. My estimate is that less than 10% of my shop receipts from the gas or store purchases have the correct time stamp. They vary from a few minutes to nearly an hour off my cell phone time, almost always behind the actual time.
The current reports don't really have a narrative section to explain the discrepancy. You can force it by answering "NO" to the question about your receipt matching what was purchased. However I don't think that is the real purpose of that question.
I have never indicated in my reports that the receipt times did not match the actual shop times. None of these reports have ever been given the dreaded "Invalid" mark from QC. I've never been sent an email asking for clarification on the discrepancy.
Based on my experience, I think that the shop editors understand that this is a common issue. The only time I would be concerned is if your required photos have a time stamp or embedded date and time information in the picture file that doesn't match your reported shop times.
Edited 1 time(s). Last edit at 01/06/2019 11:50PM by btinsd.