I am trying to buy a second wall charger for my Motorola Droid. The one that came with the phone works fine. I purchased 2 different ones and I have the same problem with both. When I plug it in the phone, the phone starts acting all screwy, apps start opening by themselves, the phone vibrates. When I unplug it, it's fine. I tried them on another droid and it does the same thing. Do I have to buy a certain wall charger for use with my phone? These 2 were advertised for the Motorola Droid. Or did I just get 2 bad ones? Or is the phone the issue?