I must start by apologizing : I don't really well speak english, and I'll probably make some basic mistakes.
While I was playing my Duo deck against a friend, a 3rd Duo Lovers Singer, Darling popped out from my deck, while I play only 2 in my deck. And at the end of the cardfight, I checked my decklist, to be sure, and discovered that I truly play only 2 Darling.
I tried to re-create the bug, and managed it. This bug doesn't create new copies of the cards in your deck, but transform some into some others.
I won't reveal how it works here, because it would be too OP (hello, let's change some G3 for a 17th and 18th in the deck...)
Spoiler
There are 7 Ahsha and 7 Maiden of Passionflower in this deck
(http://img15.hostingpics.net/pics/696885yup.png) (http://www.hostingpics.net/viewer.php?id=696885yup.png)
Spoiler
My 50 Heal triggers say "Hello"
(http://img15.hostingpics.net/pics/134370heal.png) (http://www.hostingpics.net/viewer.php?id=134370heal.png)
I think that I understand a little what happens with this bug.
My question is now : who must I send a PM explaining with more details to get this bug solved ? (in 1.85 or 1.86 (hoping 1.85 will be out too fast to have the problem solved (I shouldn't say this ; we mustn't talk about the next update))).