Done Ferret - Arcane Lamps are dissapearing

So i did set up some Arcane Lamps from thaumcraft around my house, and they did dissapear, 2 times ! What is wrong with them ? :O

 

I believe this goes in the support section

Does anyone live with you or is trusted to your claim?

 

I play with 2 mates, asked them and they dont know too. i lost 9 lamps for now and now decided to ask

 

Is the area claimed?

 

Yeah it is claimed, its my claim that i share with 2 Friends

 

Yeeha, thank you