Neb fusion downgrade A to B?

Player1

Like the title says, I fused two A nebs (Wep Def % and Int) and got a B neb (HP %) is this a bug or is there a chance to downgrade?
Also it's not possible that I mistakenly used any lower nebs because I had 20 A Nebs from the maplewatch event...

bumbertyr

Unless im mistaken nebulites can derank when fusing 2 of different ranks. I dont think bo says the same rank. Id suggest putting this in the bug report section to be looked at.

Player1

bumbertyr wrote: »

Unless im mistaken nebulites can derank when fusing 2 of different ranks. I dont think bo says the same rank. Id suggest putting this in the bug report section to be looked at.

alright

AKradian

Was reported back in March.
http://forums.maplestory.nexon.net/discussion/11171/system-nebulite-fusion-provides-lower-rank-neb