Each search process includes the following steps: Select one million results from the retrieved results to calculate scores and perform a rough sort. Then, select 200 results from the roughly sorted results to calculate scores and perform a fine sort. Return the top 5,000 results to users. The finely sorted results are first returned, and then the roughly sorted results are returned.
If a large amount of data exists, results are randomly selected and sorted. Then, estimation is made based on the statistics that are collected on the sorted results. Therefore, the value that is obtained based on the statistics is inaccurate.
If the issue persists, submit a ticket to request technical support.