Form error

[Artistichaven]

I created a custom form in an if statement. The form will take you to the right page, but will not run the next $GET. If you refresh the page (by clicking enter in the URL box, not actually refreshing) it will run the next $GET. Any ideas as to why?

if ($banTime == 0)
		 {	 	 
		  $userid = $vbulletin->GPC['userid'];
	  	  print_form_header('user', 'banned&u=' . $userid);
		  print_table_header("Ban a User");
		  print_label_row("Ban: " . $username);
		  print_select_row("Ban Length", 'banLength', array(24 => "1 Day", 48 => "2 Days", 72 => "3 Days", 168 => "1 Week", 336 => "2 Weeks", 720 => "1 Month", -1 => "Permanently"), $vbulletin->GPC['userid']);
		  print_input_row("Ban Reason:", 'banreason');
		  print_submit_row("Ban");
		 }