EF - SaveChanges() saves 2 records

I've got a ASP.NET Web Application hosted in Azure. Interestingly, sometimes the application creates two records in database.

Could anyone please confirm whether I'm doing anything silly below? Repository snippets:

private SomeEntity entities = new SomeEntity ();

 public void Add(SomeObject _someObject)
            {
                entities.EmployeeTimeClocks.AddO开发者_如何学Gobject(_someObject);
            }

 public void Save()
        {
                    entities.SaveChanges();
        }

Create snippets:

repo.Add(someObject);
repo.Save();

Note: I'm using SQL Azure for persitent storage.

I've got this JQuery to show loading, this may be causing this issue?

$('#ClockInOutBtn').click(function () {
                jQuery('#Loading').showLoading(
                        {
                            'afterShow': function () { setTimeout("$('form').submit();", 2000) }
                        }
                        );
            });

The server-side code looks good.

I think this problem is most likely caused at the javascript/client layer - I'd guess that somehow you are getting two form submits occurring.

To debug this, try:

• using Firebug (or IE or Chrome's debuggers) to detect the issue.
• using fiddler to check what is sent over the network from client to server.
• using Trace inside ASP.Net MVC to detect how many times your controller is being called.

If the problem turns out to be clientside, then you could fix this using some kind of check to prevent duplicate submissions - depending on your application's requirements, it might be worth adding this check on both client and server.