撈錯圖片問題? / 同一題目的hit rate?

[tonyatta]

Q1: 撈錯圖片
今天繼續OCR
卻發現已有3人填寫："匿名捐贈"
圖片顯示: "是"
http://campaign-finance.g0v.ctiml.tw/api/getcellvalue/345/6/7

submit完之後
然後用API去查之前的history才發現:
{"error":false,"value":"\u662f","history":[{"id":3217689,"page":3445,"ans":"\u662f","created":1399607388,"encrypted_client_ip":1559128788,"row":4,"col":8},{"id":3217030,"page":3445,"ans":"\u662f","created":1399606226,"encrypted_client_ip":1559128788,"row":4,"col":8},{"id":2600528,"page":3445,"ans":"\u533f\u540d\u6350\u8d08","created":1399056057,"encrypted_client_ip":1559128788,"row":4,"col":8},{"id":2503404,"page":3445,"ans":"\u662f","created":1398939537,"encrypted_client_ip":1559128788,"row":4,"col":8}]}

encrypted_client_ip都是我自己(第四個submit是我自己)，這應該表示: 某個時間點有抓錯圖的狀況？ 應該已經fix不會造成這個狀況了吧?

Q2: 從加密IP來看, 好像已經填寫四次了，重複率會如此的高嗎?