diff --git a/WMPageController/WMMenuView/WMMenuView.m b/WMPageController/WMMenuView/WMMenuView.m
index ac5bc3e..bbd6656 100755
--- a/WMPageController/WMMenuView/WMMenuView.m
+++ b/WMPageController/WMMenuView/WMMenuView.m
@@ -580,7 +580,9 @@ - (void)addProgressViewWithFrame:(CGRect)frame isTriangle:(BOOL)isTriangle hasBo
 
 #pragma mark - Menu item delegate
 - (void)didPressedMenuItem:(WMMenuItem *)menuItem {
-    
+    if (self.selItem == menuItem) {
+        return;
+    }
     if ([self.delegate respondsToSelector:@selector(menuView:shouldSelesctedIndex:)]) {
         BOOL should = [self.delegate menuView:self shouldSelesctedIndex:menuItem.tag - WMMENUITEM_TAG_OFFSET];
         if (!should) {
diff --git a/WMPageControllerDemo/StickyExample/StickyExample/WMStickyPageController/WMMagicScrollView.m b/WMPageControllerDemo/StickyExample/StickyExample/WMStickyPageController/WMMagicScrollView.m
index 17a733c..3660724 100755
--- a/WMPageControllerDemo/StickyExample/StickyExample/WMStickyPageController/WMMagicScrollView.m
+++ b/WMPageControllerDemo/StickyExample/StickyExample/WMStickyPageController/WMMagicScrollView.m
@@ -171,7 +171,10 @@ - (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(N
         
         if (diff == 0.0 || !_isObserving) return;
         
+        static CGFloat onePixel  = 1/[UIScreen mainScreen].scale;
         CGFloat maximumContentOffsetY = _maximumHeaderViewHeight - _minimumHeaderViewHeight;
+        maximumContentOffsetY = roundf(maximumContentOffsetY / onePixel) * onePixel;
+
         if (object == self) {
             //Adjust self scroll offset when scroll down
             if (diff > 0 && _lock) {