As you see on this screenshot, launcher3 is bugged : Icons are displayed 1, 2, 3, 4 or ??? times on the screen.

To know :
- The playstore is well configured : don't add icon option ON and do not update option ON
- Each application has been installed only 1 time.
- desinstalling and reinstalling don't solve the bug
- A factory reset doesn't solve the bug
- A friend of I have the same problem on his E7

Please help cause all e7 users will have rapidly thousands of double icons if nothing is done

Try this:
1 – find all the problematic Apps;

2 – go to Google Play — Settings – and deselect “Add icon to home screen”;

3 – uninstall the “problematic” Apps;

4 – reinstall them.

Referring to:
https://galigio.org/2015/02/02/icon4-4/