I realized that my own programmed app shows a strange dialog when I try to uninstall it:
Normally if you try to uninstall any other app is says…
What have I done wrong?
Where do I have to change something?
Ok, now I accidentally found out why and when this happens:
If you change “android:label” of the Launcher Activity to a different name than the actual app name, the app name on the start menu of your device changes.
So if you then try to uninstall the app, it simply says what the displayed and what the real name (which is e.g. shown in the settings) is.
It’s normal, many Google apps have the same message if you try to uninstall them.