mongoose doc.save fails without error in schema method

Using mongoose i am doing:

var postSchecma = mongoose.Schema({
title: String,
body: String,
link: String,
voting: {
    has: {
        type: Boolean,
    default:
        false
    },
    canVoteFor: [mongoose.Schema.Types.Mixed],
    votedFor:{},
    voteDates:{}
},
comments: [mongoose.Schema.Types.Mixed],
date: {
    type: mongoose.Schema.Types.Mixed,
default:
    new Date().getTime()
}
}, {
    strict: false,
    safe:true
})

and

postSchecma.methods.vote = function(voteFor, callback) {
var self = this;
if(self.voting.canVoteFor.indexOf(voteFor) < 0) {
    callback(new Error('Error: Invalid Thing To Vote For'));
    return;
}
this.voting.voteDates[voteFor].push(new Date().getTime())
this.voting.votedFor[voteFor]++
s = this;
this.save(function(err) {
    if(err) {
        callback(err)
    }
    console.log(err);
    console.log("this:"+ s);
    callback(s)
})
}

in postSchecma.methods.vote the value of this.voting.votedFor[voteFor] is correct. but when I query the db it is the old value. if it helps i am using the db in 2 files and the methods may not be exact duplicates. I also know it is something with mongoose because I can change the record to a different value with a mongoDB GUI and it works fine. let me know if you need any more info, thanks, Porad