Why numberOfSectionsInTableView is called twice in UITableViewController?

Is there any other reason (than calling "reloadData") why numberOfSectionsInTableView is called twice? I did debugging and found, that it's get called twice during initial startup when no custom reloadData statements are called.

I have created the table with IB but does that might cause a problem?

Have a look at the call stack. you can see that this method is being called from two different scenarios.

Probably your tableView object may instantiate twice. Once i have encountered the same problem due to this.