So i disabled Weapon Unleashed, now the weapons are not using <Replace Attack: X> as a command.
(also i made sure to get rid of the <skill_id:x> notetag from Weapon Skill, a default plugin that RPG Maker MV provides)
(UPDATE: I disabled the Weapon Skill Plugin and it still occurs)
It still performed a second attack, in addition, i found something strange in the console
(this is the second party member, they are currently wielding the "Mobster Full-Auto" and absolutely nothing else in their offhand, it still registered a second attack being executed)
(Here is the loadout thats being used, while this is in the "Troop Battle Test" System, i can confirm this still occurs outside of it)

(To better describe this, basically i have two sets of skills, one that attack a single target, and the other that attacks multiple targets all at once, i had to remove dual wield weapons that struck all targets at once as i had realized dual wielding could only go so far, so now dual wield weapons are only one hit targets while things like shotguns stick to being all hit targets but two handed).
The Mobster Full-Auto is meant to be a two-handed weapon however.
(Also, another reason I am using weapon unleashed is so i can replace the "Defend" Command, which is also why ive got Weapon Skill to the side)