Not sure why, but for quite a few cases, there are duplicate data points for the suspected build number. This affects the confidence score.

One example is : https://stgao-dot-findit-for-me.appspot.com/waterfall/check-flake?key=ag9zfmZpbmRpdC1mb3ItbWVytAELEhdNYXN0ZXJGbGFrZUFuYWx5c2lzUm9vdCJ-Y2hyb21pdW0ubWFjL01hYzEwLjkgVGVzdHMgKGRiZykvMzAxNDQvdW5pdF90ZXN0cyBvbiBNYWMtMTAuOS9SR1Z6YTNSdmNFVnVaMkZuWlcxbGJuUlRaWEoyYVdObFZHVnpkQzVVWlhOMFZHbHRaVzkxZEVScGMyTnZkVzUwDAsSE01hc3RlckZsYWtlQW5hbHlzaXMYAQw

findit.regressedBuildNumber = 30124;
findit.passRates = [{"build_number": 30117, "commit_position": 418349, "git_hash": "7532c960faf5f59ef7031e4488fce36b6e1c1cf0", "pass_rate": -1.0, "previous_build_commit_position": 418347, "previous_build_git_hash": "873f27d84aaf55a3ee7ccfb0583639464efaf7bf", "task_id": null, "try_job_url": null}, {"build_number": 30118, "commit_position": 418356, "git_hash": "54279516e75ad5f5d6d1e94d26d65930cfa9dbdc", "pass_rate": -1.0, "previous_build_commit_position": 418349, "previous_build_git_hash": "7532c960faf5f59ef7031e4488fce36b6e1c1cf0", "task_id": null, "try_job_url": null}, {"build_number": 30119, "commit_position": 418368, "git_hash": "f714d2bd4450811bae2c849b075344eb31814cd6", "pass_rate": -1.0, "previous_build_commit_position": 418356, "previous_build_git_hash": "54279516e75ad5f5d6d1e94d26d65930cfa9dbdc", "task_id": null, "try_job_url": null}, {"build_number": 30120, "commit_position": 418380, "git_hash": "6e0ec0d0f1f709a1e2de02d439bcedbf6c3cb66a", "pass_rate": -1.0, "previous_build_commit_position": 418368, "previous_build_git_hash": "f714d2bd4450811bae2c849b075344eb31814cd6", "task_id": null, "try_job_url": null}, {"build_number": 30121, "commit_position": 418386, "git_hash": "f769f364f71068930d971dafb86dc1c5f298a8a7", "pass_rate": -1.0, "previous_build_commit_position": 418380, "previous_build_git_hash": "6e0ec0d0f1f709a1e2de02d439bcedbf6c3cb66a", "task_id": null, "try_job_url": null}, {"build_number": 30122, "commit_position": 418393, "git_hash": "198198900ec8d059d4d92be422cd65765c5a9ecf", "pass_rate": -1.0, "previous_build_commit_position": 418386, "previous_build_git_hash": "f769f364f71068930d971dafb86dc1c5f298a8a7", "task_id": null, "try_job_url": null}, {"build_number": 30123, "commit_position": 418395, "git_hash": "0df48d0d705860efe7904dd943669691eebff1d8", "pass_rate": -1.0, "previous_build_commit_position": 418393, "previous_build_git_hash": "198198900ec8d059d4d92be422cd65765c5a9ecf", "task_id": null, "try_job_url": null}, {"build_number": 30124, "commit_position": 418399, "git_hash": "0bb91bc3ffc6b11ba7d5c024e1fd89ddca3ffadb", "pass_rate": 0.040000000000000001, "previous_build_commit_position": 418395, "previous_build_git_hash": "0df48d0d705860efe7904dd943669691eebff1d8", "task_id": null, "try_job_url": null}, {"build_number": 30124, "commit_position": 418399, "git_hash": "0bb91bc3ffc6b11ba7d5c024e1fd89ddca3ffadb", "pass_rate": 0.040000000000000001, "previous_build_commit_position": 418395, "previous_build_git_hash": "0df48d0d705860efe7904dd943669691eebff1d8", "task_id": null, "try_job_url": null}, {"build_number": 30130, "commit_position": 418446, "git_hash": "846a59b93f9911517c7aeb05b47af9b4c0cad175", "pass_rate": 0.12, "previous_build_commit_position": 418441, "previous_build_git_hash": "24430ece16aa10aa57644daeddafe25032fd359c", "task_id": null, "try_job_url": null}, {"build_number": 30135, "commit_position": 418475, "git_hash": "87b8f7c3fc3e5bbcc9601023df0fe79cb79234e8", "pass_rate": 0.12, "previous_build_commit_position": 418474, "previous_build_git_hash": "d4f486c125772068950e8e43e3805dcf74eb23f5", "task_id": null, "try_job_url": null}, {"build_number": 30139, "commit_position": 418489, "git_hash": "d21e91636020a277b52bdbdde73d1e07ee0c57c0", "pass_rate": 0.089999999999999997, "previous_build_commit_position": 418484, "previous_build_git_hash": "ab3b40011e106bca7a83b880f332347bc7e7aae4", "task_id": null, "try_job_url": null}, {"build_number": 30142, "commit_position": 418494, "git_hash": "66c7a4cb89abd6a94f36c1ef976e08f7f9878255", "pass_rate": 0.10000000000000001, "previous_build_commit_position": 418491, "previous_build_git_hash": "14f15f11744445a7adb34030719afeb41a9432d0", "task_id": null, "try_job_url": null}, {"build_number": 30144, "commit_position": 418501, "git_hash": "4279cdda650058bbf7b82ddf6448927a532b1c76", "pass_rate": 0.070000000000000007, "previous_build_commit_position": 418499, "previous_build_git_hash": "517b1298eb6d07a30f07eade189a792c880c00df", "task_id": null, "try_job_url": null}];

For the time-being, I will write a script to clean that up, but it might be a bug in the code.