hasMany association woes

Running into a problems where I have two models, Site and Evaluation, such that a Site hasMany

Evaluations and an Evaluation belongsTo a Site. I have tried both the localstorage and sql proxies, and get the same behavior.

I am able to get the data associated just fine when I first do a load, as per the getData output of my instantiated Site model:

Code:

Object {id: "1c70511b-7b99-40af-9dac-bc63facc384b", remoteSiteId: 38079, siteName: null, address_id: "34563f7c-9451-4b3b-901d-126cf8f41d63", Evaluations: Array[1]…}
            Address: Object
            Evaluations: Array[1]
                0: Object
                Site: Object
                category: null
                comments: null
                dateOfEvaluation: null
                datePostedToRemote: null
                evaluationType: null
                evaluator_id: 265
                id: "5fa845e4-7699-4fb5-91d3-83921a514bf6"
                noLongerExists: null
                remoteEvaluationId: 44215
                site_id: "498d2ba4-a998-4090-b9a8-38003ef290d6"
                __proto__: Object
                length: 1
                __proto__: Array[0]
            address_id: "34563f7c-9451-4b3b-901d-126cf8f41d63"
            id: "1c70511b-7b99-40af-9dac-bc63facc384b"
            remoteSiteId: 38079
            siteName: null
            __proto__: Object

But after I do a reload of the DOM, the hasMany association goes away:

Code:

   Object {id: "1c70511b-7b99-40af-9dac-bc63facc384b", remoteSiteId: 38079, siteName: null, address_id: "34563f7c-9451-4b3b-901d-126cf8f41d63", Evaluations: Array[0]…}
            Address: Object
            Evaluations: Array[0]
                length: 0
               __proto__: Array[0]
            address_id: "34563f7c-9451-4b3b-901d-126cf8f41d63"
            id: "1c70511b-7b99-40af-9dac-bc63facc384b"
            remoteSiteId: 38079
            siteName: null
            __proto__: Object

I've searched high and low, and the closest I could find was mention of problems of storing hasMany associations in Webstorage, but this was pre-Sencha Touch 2.3 (I am using 2.3.1). As a side note, hasOne associations are just fine (my Address object is just such a thing).

Just for sanity's sake, my models are defined below:

Code:

Ext.define('EvaluateIt.model.Site', {
    extend: 'EvaluateIt.model.BaseModel',
    config: {
        idProperty: 'id',
        fields: [
            {name: 'id', type: 'int'},
            {name: 'remoteSiteId', type: 'int'},
            {name: 'siteName', type: 'string'}, // does site have a formal name
            {name: 'address_id', type: 'string'}
        ],
        proxy: {
            type: "localstorage"
        },
        hasMany:
        [
            {
        model: 'EvaluateIt.model.Evaluation',
                name: 'Evaluations',
                primaryKey: 'id',
                foreignKey: 'site_id',
                associationKey: 'siteEvaluations'
            }
        ],
        hasOne: [
            {
                model: 'EvaluateIt.model.Address',
                getterName: 'getAddress',
                setterName: 'setAddress',
                name: 'Address',
                primaryKey: 'id',
                foreignKey: 'address_id',
                foreignStore: 'Addresses'
            }
        ]
    }
});

Code:

Ext.define('EvaluateIt.model.Evaluation', {    extend: 'EvaluateIt.model.BaseModel',
    config: {
        idProperty: 'id',
        fields: [
            {name: 'id', type: 'int'}, // pk
            {name: 'category', type: 'string'}, //used to categorize for selection of view 
            {name: 'remoteEvaluationId', type: 'int'}, // linking id to remote JSON
            {name: 'dateOfEvaluation', type: 'date'}, // date evaluation done
            {name: 'datePostedToRemote', type: 'date'}, // date successfully uploaded to remote
            {name: 'evaluationType', type: 'int'}, // type of evaluation done - to be added in the future`
            {name: 'site_id', type: 'string'},    // linking id for associations
            {name: 'evaluator_id', type: 'int'},
            {name: 'noLongerExists', type: 'boolean'}, // invalid site: nothing to evaluate!
            {name: 'comments', type: 'string'} // general comments
        ],
        proxy: {
            type: "localstorage"
        },
        belongsTo: [
            {
                model: 'EvaluateIt.model.Site',
                name: 'Site',
                primaryKey: 'id',
                foreignKey: 'site_id'
            }
        ]
    }
});

Any ideas what is going on here? Much appreciated!