[SexMaster]

var usersStore = new Ext.data.JsonStore({
		totalProperty: 'total',
		root: 'results',
		url:'getlog.php',
		fields: [
			{name: 'id', type: 'int'},
			{name: 'date', type: 'int'}
		]
	});

Вот так будет правельнее...

var usersStore = new Ext.data.JsonStore({
		totalProperty: 'total',
                      baseParams:{'ds:1'},
		root: 'results',
		url:'getlog.php',
		fields: [
			{name: 'id', type: 'int'},
			{name: 'date', type: 'int'}
		]
	});