Ion-infinite-scroll problem

ionic-v1
1

when i scroll to the bottom,keep repeat out same post for me,anything can help me please …here is my html code

  <ion-item class="item-text-wrap" ng-repeat="post in posts" href="#/app/index/{{post.id}}">
    <div class="item item-image">
      <img ng-src="{{post.better_featured_image.source_url}}"/>
    </div>
    <h2 style="font-size: 20px; padding-top: 10px;"><b>{{post.title.rendered}}</b></h2>
    <h3><i class="ion ion-ios-calendar-outline padding"></i>{{post.date | limitTo: 10}}</h3>
    <p>{{post.plaintext | limitTo: 100}} {{post.plaintext.length > 150 ? '&hellip;' : '' }}</p>
  </ion-item> 
</ion-list>
<ion-infinite-scroll
  on-infinite="loadMore()"
  distance="1%">
</ion-infinite-scroll>

here is my controller

angular.module(‘menu.CTRL’, [])

.controller(‘mainCTRL’, function($scope, $http, $ionicModal, $ionicHistory, $state) {

$scope.posts = [];

$http({
	method:"GET",
	url: "http://www.maixandsandy.com/wp-json/wp/v2/posts"
	}).then(function(newsData) {
	angular.forEach(newsData.data, function(newsArticle) {
	$scope.posts.push(newsArticle); 
	$scope.whichtitle = $state.params.aId;
	});

	
	$scope.doRefresh= function() {
		$http({
		method:"GET",
		url: "http://www.maixandsandy.com/wp-json/wp/v2/posts"
		}).then(function(newsData) {
		$scope.posts = newsData.data; 
		$scope.$broadcast('scroll.refreshComplete');
		});
	}				
})    

$scope.myGoBack = function() {
  $ionicHistory.goBack();
};

$scope.loadMore = function() {
	var parameters = {};
	$http.get('http://www.maixandsandy.com/wp-json/wp/v2/posts',  { params: parameters }).success(function(items) {
		angular.forEach(items, function(item) {
			$scope.posts.push(item);
		});
		$scope.$broadcast('scroll.infiniteScrollComplete');
	});
};

});