sockets form as a group without me telling them to

[sierratango]

Hi!

I have a Telldus Tellstick Net and three sockets (Proove self-learning white). I have set it up so I can turn on/off lamps around the house, one at the time. It all workes fine for some time, then suddenly when I want to turn one of the lamps of/on, they all turn on/off. And I have to redo the whole thing.. Has this happend to any of you?