Template data destruction

Template.Foo.created = function(){
    console.log(this);
    this.data.store = new ReactiveDict()
    this.data.store.set('post',{});
    this.data.store.set('images',[]);
    this.data.store.set('files',[]);

};

Template.Foo.events({
    'change #imageInput': function(event, template) {
        var images = template.data.store.get('images');
        var index = images.length;
        var uploaded = false;
        var uploader = new Slingshot.Upload("imageUploads");
        uploader.send(event.target.files[0], function (error, downloadUrl) {
            uploaded = true;
            if(error){
                alert(error.error, error.reason);
                images.splice(index,1);
            }else{
                images[index] = {index: index, url:downloadUrl, uploader:uploader, type:'image'};
            }
            console.log(images);
            template.data.store.set('images',images);
        });
        if(!uploaded){
            images.push({index : index,uploader:uploader, type:'image'});
            template.data.store.set('images',images);
        }
        imageUploads = images;
    },

    'change #fileInput': function(event, template) {
        var files = template.data.store.get('files');
        var index = files.length;
        var uploaded = false;
        var uploader = new Slingshot.Upload("fileUploads");
        uploader.send(event.target.files[0], function (error, downloadUrl) {
            uploaded = true;
            if(error){
                alert(error.error, error.reason);
                files.splice(index,1);
            }else{
                files[index] = {url:downloadUrl,uploader:uploader, index:index, type:'file'};
            }
            template.data.store.set('files',files)
        });
        if(!uploaded){
          files.push({uploader:uploader, index:index, type:'file'});
          fileUploads = files;
        }
        template.data.store.set('files',files)
    },

    'click #add_commit':function(event, template){ //SHOULD NOT BE COMMIT, SHOULD BE POST OR UPDATE
        var values = {};
        values.content = template.find('#post_text').value;
        if(values.content.length < 1){
            //TODO: make a popup or warning ask for post content
            return false;
        }

        values.author_name = tmpl.data.managed_mosque.name;
        values.images = _.pluck(tmpl.data.store.get('images'),'url');
        values.posted_date = new Date();
        values.relevant_date = new Date();
        Posts.update(Posts.findOne()._id,{$push:{posts:values}});

        template.find('#post_text').value = "";
        //After this runs, template.data.store is undefined
    }
});