Checkbox state persisting thru postback when it shouldn't

As covered at question https://www.experts-exchange.com/questions/21782448/Initialize-Checkboxes-based-on-multi-DataTable-conditions.html

I have the following code that generates a table and a grid of checkboxes at runtime. The code correctly initializes checkbox on the 1st pass but persits changes after postback. Since it's generating everything at runtime and i haven't yet implemented 'save to db' code the post back should re-initialize everything back to original state. Here's th code....note that I've explicitly turned off viewstate for both the table and the checkboxes. The function's called at each Page_Load.

    Function CreateCheckBoxGrid()
        Dim GetTimePeriods = "select distinct datename(m,dateDue) + '-' + datename(day,dateDue) + '-' + datename(year,dateDue) , dateDue from RequiredModules order by dateDue"
        Dim myConnection As New SqlConnection(connStr)
        myConnection.Open()

        Dim myCommand As SqlCommand = New SqlCommand(GetTimePeriods, myConnection)

        Dim reader As SqlDataReader = myCommand.ExecuteReader()

        If reader.HasRows Then
            Do While reader.Read()
                lbGetDateDue.Items.Add(New ListItem(reader.GetString(0).ToString, reader.GetDateTime(1).ToString))
            Loop
        Else
            Console.WriteLine("No rows returned.")
        End If
        myConnection.Close()

        Dim ds As New DataSet

        Dim GetTitles = "select distinct strTitle, idTitle from FacilityTitles where FacilityID = 10159 order by strTitle;"
        GetTitles = GetTitles & "select ModuleName, moduleID from modules where moduleID > 0 order by ModuleID; "
        GetTitles = GetTitles & "select moduleID, idTitle, ReqModID from RequiredModules where dateDue = '" & lbGetDateDue.SelectedValue & "'  order by Moduleid "

        ds = SqlHelper.ExecuteDataset(connStr, CommandType.Text, GetTitles)

        ds.Tables(0).TableName = "Titles"
        ds.Tables(1).TableName = "Modules"
        ds.Tables(2).TableName = "FKey"

        'build table
        Dim tb As New HtmlTable
        tb.EnableViewState = False
        tb.CellSpacing = 1
        tb.Border = 1

        Dim tbr As New HtmlTableRow
        Dim tbc As New HtmlTableCell

        ' empty cell in the corner
        tbr.Cells.Add(tbc)

        'build first row as
        Dim myCurModuleID As Integer
        For Each myModule As DataRow In ds.Tables("Modules").Rows
            tbc = New HtmlTableCell
            Dim lbl As New Label
            lbl.Text = myModule(0)
            tbc.Controls.Add(lbl)
            tbr.Cells.Add(tbc)
        Next

        tb.Rows.Add(tbr) ' Add the row to table

        Dim intRow As Integer = 0
        For Each myTitle As DataRow In ds.Tables("Titles").Rows

            Dim myCurTitleID = myTitle(1)
            tbr = New HtmlTableRow
            tbc = New HtmlTableCell
            Dim lbl As New Label
            lbl.Text = myTitle(0)
            tbc.Controls.Add(lbl)
            tbr.Cells.Add(tbc)   ' Add Title A - Z to first cell of each row

            Dim i As Integer
            For i = 0 To ds.Tables("Modules").Rows.Count - 1
                myCurModuleID = ds.Tables("Modules").Rows(i).Item(1)
                ' each iteration adds row
                ' with an unchecked checkbox
                tbc = New HtmlTableCell
                Dim cb = New CheckBox
                cb.Checked = False
                cb.EnableViewState = False

                'iterate thru all records in FKeys table
                'to identify which rows have a idTitle field
                'that matches the current idTitle (myTitle(1))
                Dim blnChecked As Boolean = False
                For Each keyMapRow As DataRow In ds.Tables("FKey").Rows
                    If keyMapRow(1) = myCurTitleID And keyMapRow(0) = myCurModuleID Then
                        blnChecked = True
                        Exit For
                    End If
                Next

                cb.Checked = blnChecked
                tbc.Controls.Add(cb)
                tbr.Cells.Add(tbc)
            Next

            ' add this row to table
            tb.Rows.Add(tbr)

        Next

        Me.Panel1.Controls.Add(tb)
    End Function