Question Making threads and editing it

[Aero]

When I make a thread I get 10 credits, but when I edit it I loose all the credits. Is this a bug or am I missing something ? If I was to remove the whole thread this would be okay, but making an edit to it shouldn't charge me. At least not as much as I got when making it. Hope this makes senses ?

Thanks

 

[Darkwaltz4]

You set a negation which is applied when editing, so that a recalculation occurs for it.