C# - OnCheckedChanged Event Fires More And More Times For Every Time It Is Clicked?

I have an ASP.NET page that contains a gridview.

I have to create columns dynamically based on a datatable, some field type info and some header texts.

I do that by creating templates.

It created the grid fine and all looks good, however when i click a checkbox and the checkedchanged event fires then something odd happens

The first time i click its fine and i get the expected values in the event

But the second time then the event gets fired with the values from the first time and then again with the values from the checkbox that i actually clicked.. The third time the event gets fired 3 times, first 2 times with the old values and the third with the correct value.

Here is the code:

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Text.RegularExpressions;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;........