The discrepancies between seen in CTR and CVR in the A/B testing and Analytics dashboards are due to outlier traffic being removed from A/B Test results, while still being included in the Analytics dashboard. When you click through to the Analytics dashboard to see detailed A/B test results, the metrics there include the outliers.
The removal of outliers from A/B tests is designed to give the most accurate results, and we therefore recommend you refer to the A/B test results.
You can check the number of outliers that were removed from each variant by hovering over the Tracked Searches and Tracked Users counts for each variant.