It seems you are using an Android device - could you let us know which device, manufacturer and OS version this occurs on? Also, is this a problem only with a single device, or is it reproducible on other devices / operative systems as well?
From the quick inspection it seems that something might be going wrong because the device is not rendering transparency in your transitions properly. Try to split your animation in multiple scenes, so each fade-in / fade-out is a separate scene (just add action go to next scene at the end of each scene). Your animation should look the same, the difference will be that only the resources from a single scene should be visible at the time, so overlap shouldn't be possible.
Let us know if this works, and also we would really appreciate if you can answer the above questions so we can look into this more exactly.