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java.lang.IndexOutOfBoundsException: Index: 16, Size: 15	at java.util.ArrayList.add(ArrayList.java:457)	at me.ccrama.redditslide.DragSort.ReorderSubreddits$3.onItemMoved(ReorderSubreddits.java:268)	at me.ccrama.redditslide.DragSort.DragSortRecycler.onTouchEvent(DragSortRecycler.java:315)	at android.support.v7.widget.RecyclerView.dispatchOnItemTouch(RecyclerView.java:2464)	at android.support.v7.widget.RecyclerView.onTouchEvent(RecyclerView.java:2607)	at android.view.View.dispatchTouchEvent(View.java:9939)	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2663)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2344)	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2669)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2358)	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2669)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2358)	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2669)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2358)	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2669)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2358)	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2669)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2358)	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2669)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2358)	at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2669)	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2358)	at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:411)	at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1810)	at android.app.Activity.dispatchTouchEvent(Activity.java:3061)	at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:63)	at android.support.v7.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:63)	at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:373)	at android.view.View.dispatchPointerEvent(View.java:10159)	at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4434)	at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4302)	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3849)	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3902)	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3868)	at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3995)	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3876)	at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4052)	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3849)	at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3902)	at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3868)	at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3876)	at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3849)	at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6210)	at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6184)	at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6145)	at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6313)	at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)	at android.os.MessageQueue.nativePollOnce(Native Method)	at android.os.MessageQueue.next(MessageQueue.java:323)	at android.os.Looper.loop(Looper.java:136)	at android.app.ActivityThread.main(ActivityThread.java:6077)	at java.lang.reflect.Method.invoke(Native Method)