One of the more challenging aspects of review management in platforms such as Google that only permit a single review container (reviewer, review image, rating, comment, date) and single response container (response, date) is dealing with customer updated reviews. 

Any updated review, regardless of the scope of the edit, receives a new date/time stamp corresponding to the edit. The response date doesn't change, resulting in this confusing (and real-world) presentation below on Google for a review.

In order to prevent confusion, users can go into their ReviewsInbox™ and edit the response. This will edit the timestamp of the response.

Compounding the challenge is the fact that Google does not keep available the original review content. It is simply over-written and provided a new date stamp. This is a known Google bug that they hope to update with the their next API code update.