I created a folder to put all the apps that i downloaded into that folder.
I then go to a different screen and try to add a widget and it will delete and not paste to the screen.
If i try to move a widget it will delete from the screen.
I then reboot phone and i can added widgets to the screens and move them.
If i reopen the folder i created then close it and go to a different screen, it will delete widgets if i try to add or move them.
If i delete the folder (with all my widgets in the folder) it will work fine.