Search commits API return weird result

Hi GitHub Support!

I use Search commits API to get my total commits in 2021, I use this syntax:

$ curl -H 'Accept: "application/vnd.github.cloak-preview"' 'https://api.github.com/search/commits?q=author:cuonglm&q=author-date:>2021-01-01' | jq '.total_count'
89450619

I know the right query must be ?q=author:cuonglm%20author-date:>2021-01-01, but I can’t understand the number return in above curl command. How can it be more than 8 million commits?