使用相同字段成功搜索后，MongoDB（Mongoose / MLab）中的数据丢失

I have a very specific question. I have a web project that is using Express (Node.JS) and MLab (MongoDB/Mongoose). I've manually edited several records in a collection (yeah, I know, bad idea) and am using one of those fields in a Mongoose search. The schema is defined as follows: (relevant part only)I have a very specific question. I have a web p