OnChange events always called twice after new record creation (Good Practice)

AccountForm.js

var MEA = window.MEA || {};
var accountForm = MEA.accountForm || {};

(function () {
    this.OnLoad = function (onLoadContext) {
        console.log("onLoad ....");
        var eventArgs = onLoadContext.getEventArgs();
        var formContext = onLoadContext.getFormContext();
        if (eventArgs.getDataLoadState() == 1) {
            formContext.getAttribute('telephone1').addOnChange(this.OnChangeHandler);
        }       
    };
    this.OnChangeHandler = function (onChangeContext) {
        console.log("The field is changed...")
    };
}).call(accountForm);