Hi guys
I think this is different cases. The HTTP library we use for firing the hooks have a quite annoying "feature" where it retries the request if it times out. We should switch to another library that doesn't try to be so smart. I am on vacation this week, so I won't be able to do that until a week from now.
Regarding the original question, can you check what the "type" parameter is set to when the second hook call is made? If it is really the same parameters, I would guess you have two hooks identical hooks registered.
Christian