Why is the number of reviews and the review so different?

Why is the number of reviews and the review% so different?

If you encounter an ASIN where the number of reviews and the review% are very different this indicates AZInsight might have not seen all the reviews or you are viewing reviews from a large date range and need to narrow down to the last 365 days (1 year).  To fix this do the following: 

1. Change the date range the review are gathered from to last 365 by following the instructions here
2. Click the refresh icon button on the Variations