Problem in relations when edit a relation

X adds a 'friend' relation with Y
X adds a 'friend' relation with Z
X adds a 'friend' relation with W

In Relations tab,when I edit once a relation and, for example, check both boxes, the next relations I'll edit will have both checboxes checked

I edit my relation with Y and check also 'work' : i'm friends + work
I edit my relation with Z : friends and work are checked
+ the checkboxes stays displayed after I clicked on edit (they are supposed to disapear)