The system does not default to a Review Date that falls within a previous review period when adding a new RAR; this only occurs when a RAR was not completed within its review period.
To correct the date(s), click on the three-dot dot menu then select Configure Current RAR as highlighted below:
You will be presented with the following screen, where you can correct the dates. You can also edit the Reviewer for this particular RAR instance.
Remember to click the Save button.