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 review 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 come from to last 365 by following the instructions here
2. Click the refresh icon button on the Variations