why angularjs controller loading twice - angularjs

Question

Here is my route config, I am using routeProvider to bind controller to view and not declaring ng-controller in my view still my controller loading twice, I searched for lot of solutions and tried every thing but no use.
$routeProvider.when("/home", {
controller: "homeController",
templateUrl: "app/views/home.html"
}).when("/login", {
controller: "loginController",
templateUrl: "app/views/login.html"
}).when("/regcars", {
controller: "RegCarsController",
templateUrl: "app/views/client/RegCars.html"
}).otherwise({ redirectTo: "/home/" });
Here is template(view)
<div class="col-md-6 box box-success pull-left">
<div class="box-header with-border">
<h3 class="box-title">My cars</h3>
<div class="box-tools pull-right">
<button class="btn btn-box-tool" data-widget="remove"><i class="fa fa-times"></i></button>
</div>
</div>
<div class="box-body">
{{CarName}}
</div>
</div>
And here is my controller
app.controller('RegCarsController', function ($scope) {
$scope.CarName = "MyCar";
alert('MyCar');
});
In my above code showing alert twice. Below I have link to call the view, tried with and with out slash at end of href link
<a href="#/regcars/">
<i class="fa fa-car fa-2x"></i> <span>My Cars</span>
</a>

Answer 1

Some proof of concept that controller is called many times. Strange.
On the other hand - the same code on JSFiddle - shows that controller is executed / fired only once.
angular.module('app', ['ngRoute']).config(function($routeProvider) {
$routeProvider.when("/home", {
controller: "homeController",
templateUrl: "app/views/home.html"
}).when("/regcars", {
controller: "RegCarsController",
templateUrl: "app/views/client/RegCars.html"
}).otherwise({ redirectTo: "/home" });
})
.run(function($templateCache) {
$templateCache.put('app/views/home.html', '<div>home tempalte</div>');
$templateCache.put('app/views/client/RegCars.html', '<div>cars template, car name: {{ CarName }}</div>');
})
.controller('homeController', function() {})
.controller('RegCarsController', function($scope) {
$scope.CarName = "MyCar";
console.log('Called many times')
});
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular-route.min.js"></script>
<div ng-app='app'>
<ul><li><a href='#/'>Home</a></li><li><a href='#/regcars'>Cars</a></li></ul>
<ng-view></ng-view>
</div>