Cookie duplicated in document.cookie

Question

client = IE9, server = asp.net (a sharepoint application page to be exact)

In the Page_Load method of a page, I have the following code:

Response.Cookies["XXXXX"].Value = tabtitles.IndexOf(Request.Params["tab"]).ToString();
Response.Cookies["XXXXX"].Expires = DateTime.Now.AddDays(1);

My cookie logic wasn't behaving as expected, so using the Console in IE Developer Tools I've found that document.cookie had the following value:

>> document.cookie
    "XXXXX=3; WSS_KeepSessionAuthenticated={7da6dcd3-28b6-4c8f-b507-6fa80a16143c}; databaseBtnText=Open%20with%20Access; databaseBtnDesc=Works%20with%20items%20in%20a%20Microsoft%20Access%20database%2E; XXXXX=7" 

as you can see, the cookie was appended to the end of document.cookie instead of replaced. is this a bug in IE9? How can I correctly set and get the cookie i want?

Answer 1

The problem was that I had earlier set a cookie with the jquery plugin, which sets the current path as that path for the cookie. The above .Net code sets the path of the added cookie to "/" , so there was two different cookies present, which was invisible to me when viewing the document.cookies variable. My solution was to set the path of the jquery cookie to be "/" .