It is not uncommon to see the application icon on the device. However, when your application loads on the App Store, everything will be fine.
Is your iOS device iOS7? If not, you will also need to add 57x57 and 114x114 icons. See https://stackoverflow.com/a/3188261/superfilms/index.html It is always useful to include all the sizes of the icons that you may need in the iOS bundle.
Hristo
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