[Senna]

The first, when using both Quick draw with fire hound and fire shells from MG to stack the salamander sword with rampage. The enemy gains the indicator that they have rampage debuff but the debuff does not actually applies. As they may have the status saying they have - 30 def, it doesn't affect their actual def. It's like the game is lying to you basically; saying they're under the effect when they're actually not. This only happens when you're using Firehound bullets and fire shells from MG.

As for the second, yes because that weapon I've showed it being attached to, I've had it unequipped for several battles and the effect was still leeches onto it. I was able to do this with my sword as well but that time, it was in the bank.