Why does it not download?!!

This app has great potential. Other than the things I am about to complain about, its great. Its great when it comes to adding effects and gun noises. But... it has a couple of issues. The first one is that it delays whenever you want to preview it. The app has a feature called "preview" which basically means you can watch it while you are editing it. But whenever I do this, it delays a few seconds and the sound is not in line with the video. This means I have to process the whole video to see if I did it right which can take like 5 minutes just to see one thing. Another thing is once youve processed it, you cant fast forward. So if you have a 5 or 6 minute video, and you want to see something in the end, then you gotta some time. Those arent the huge complaints, just minor ones but should definitely be fixed. The final one which is really making me mad is that whenever Ive fully edited a video, and press the button to save it to my camera roll, it doesnt do it. I am making nerf war videos and I have to download the video to my camera roll in order to add other things like music. I have fully edited a video that is 4 minutes and 38 seconds. But whenever I press the button to download it, it says it downloaded, but then I go to my camera roll and its not there. This is huge because it prevents me from doing anything with it. If you fixed these things this app would be wonderful. Please listen.

XXSWAGNINJAXX about Gun Movie FX, v6.0.3