Mvc controller return retaining old view name

See more:

C#

MVC

Razor

OK,

Here's an odd one!

I am returning a view
return

View("Index", clients)

and the resulting Razor page is, in fact the Index page.
HOWEVER,
The URL is retaining the "old" Razor page name ("EditRecord.cshtml") which is causing that page's action to be called when paigng through my grid.

CONTROLLER...

[HttpGet]
        public ActionResult UpdateClient()
        {
            // Perists record chagnes to database
            const string PROCNAME = "UpdateClient";

            try
            {
                int id = Convert.ToInt32(Request["ID"]);
                // Routine (actually stored proc.) will check for the existence of this ID
                //     and update an existing records or create a new.
                //Request.Form["name"].ToString();

                //clientMethods.SaveClient(Convert.ToInt32(collection["ClientGrid.id"].ToString()), collection["Name"], collection["ClientGrid.Email"]);
                clientMethods.UpdateClient(Convert.ToInt32(Request["id"].ToString()), Request["Name"].ToString(), Request["Email"].ToString());
                List<Client> clients = clientMethods.GetClients();
                return View("Index", clients);
            }
            catch (Exception ex)
            {
                ProgLog.Log(ex.Message, PROCNAME, MODNAME);
                return null;
            }
        }

URL:
http://localhost:52545/Client/UpdateClient?ID=1&Name=Stu+Pidasso&Email=stupiddaso%40gmail.com

In the above /Client/UpdateClient are the PREVIOUS SUBMIT.

What gives, you people?

What I have tried:

[HttpPost]
[HttpGet]

Not using form SUBMIT at all and relying on form collection.

I should add that I'm using grid.mvc that grab URL info for pagination. Not always appreciated.