According to the document at “https://dev.twitter.com/rest/reference/get/users/search” this endpoint “search.json” should return up to 1,000 results. however it only returns 20 and when paging it returns to same 20 over and over. It also returns incomplete results. I.E. a query for Barack Obama does not return the president’s verified account.
This is, as far as I know a known bug and Twitter is working on resolving it.
I don’t see any “Tracking” for it?