I have a GridPanel with a toolbar used to filter the grid's contents, the filter works on the first attempt however, if you change the filter criteria it always displays the same data. I have checked the POST data with FireBug and it is always posting the same data, so the issue is definitely in the ext. I have been attempting to fix this for several days, so any help you can provide would be appreciated.

Code is below

Code:
osTransactions.superclass.constructor.call(
this, {


        title: 
'Transactions',

        iconCls: 
'fam_table_multiple',

        


        store: transactions,

        columns: [


            {width: 23, dataIndex: 
'', fixed: true, menuDisabled: true},

            {header: 
"Date", width: 75, sortable: false, dataIndex: 'date', hideable: false},

            {header: 
"SKU", width: 160, sortable: false, dataIndex: 'sku', hideable: false},

            {id: 
'description', width: 160, header: "Description", sortable: false, dataIndex: 'description', hideable: false},

            {header: 
"Quantity", width: 75, sortable: false, align: 'center', renderer: this.renderQty, dataIndex: 'qty', hideable: false},

            {header: 
"Department", width: 150, sortable: false, align: 'left', dataIndex: 'dept', hideable: false},

            {header: 
"Cost", width: 100, sortable: false, align: 'left', dataIndex: 'cost', hideable: false, renderer: 'usMoney', summaryType:'pass', summaryRenderer: totalCostSummary},

            {header: 
'Vendor', width: 200, sortable: false, dataIndex: 'vendor', hideable: false}

        ],

        sm: 
new Ext.grid.RowSelectionModel({singleSelect:true}),

        plugins: [summary],

        


        tbar: [

            
new Ext.Toolbar.TextItem(

                
' Department:  '

            ), departmentsCombo, 
'-',

            
new Ext.Toolbar.TextItem(

                    
' Vendor:  '

                ), vendorsCombo, 
'-', 

            
new Ext.Toolbar.TextItem(

                
' From:  '

            ), start_date, 
'-', 

            
new Ext.Toolbar.TextItem(

                
' To:  '

            ), end_date, 
'-', 

            {id: 
'filter', text: 'Filter', tooltip: 'Filter the list', iconCls: 'fam_arrow_refresh', handler: this.filterList, scope: transactions},

            
'->',

 

            {id: 
'tb_pdf'    , text: 'Export', tooltip: 'Export Transactions List to Excel', iconCls: 'fam_excel', handler: this.toPDF, scope: this}

        ],

        
 

        bbar: 
new Ext.PagingToolbar({

            pageSize: 100,

            store: transactions,

            displayInfo: 
true,

            displayMsg: 
'Displaying transactions {0} - {1} of {2}',

            emptyMsg: 
"No transactions to display"

        })

    });

    

    
this.getView().getRowClass = function(record, index)

    {

        
return (record.get('dept_id') == -1) ? 'row-adjust' : (record.get('qty') < 0 ) ? 'row-take' : 'row-put';

    };

    

};


Ext.extend(osTransactions, Ext.grid.GridPanel,  {


    

    renderQty : 
function(val)

    {

        
if(val > 0){

            
return'<span style="color:green;">' + val + '</span>';

        }
elseif(val < 0){

            
return'<span style="color:red;">' + (val*-1) + '</span>';

        }

        
return val;

    },

    filterList:
function(c){

        
 
 

        
this.baseParams.DEPT = this.departmentsCombo.getValue();

        
this.baseParams.VENDOR = this.vendorsCombo.getValue();

        
this.baseParams.FROM = Ext.util.Format.date(this.start_date.getValue(), "Y-m-d H:i:s.u");

        
this.baseParams.TO = Ext.util.Format.date(this.end_date.getValue(), "Y-m-d H:i:s.u");

        
this.reload()

    },

    clearFilter:
function(){

        
this.reset();

        
this.transactions.baseParams.DEPT = "";

        
this.transactions.reload()

    },

 
///

        b.enable();

    },

    
// disable the default context menu

    afterRender : 
function(){

        osInventory.superclass.afterRender.call(
this);

        
this.el.on('contextmenu', function(e){

            e.preventDefault();

        });

    }

});