According to http://developer.android.com/guide/components/loaders.html, one of the nice thing about loader is that, it is able to retain its data during configuration chang
If you are using FragmentManager's replace fragment technique this issue will happen.
When you replace/remove the Fragment, the fragment is detached from the activity and since loaders are attached to the activity, the loaders will be recreated during orientation change.
Try using FragmentManager's hide/show technique. May be this will help you.