Bullet rotated the wrong way (still shooting the right direction)?

I'm using the FastCast module, but the problem I am having is definitely not related to the module. Here is where I believe the problem is:

if Tool.Parent:IsA("Backpack") then return end 
	
	local directionalCF = CFrame.new(Vector3.new(), direction)
	local direction = (directionalCF * CFrame.fromOrientation(0, 0, RNG:NextNumber(0, TAU)) * 					CFrame.fromOrientation(math.rad(RNG:NextNumber(MIN_BULLET_SPREAD_ANGLE, MAX_BULLET_SPREAD_ANGLE)), 0, 0)).LookVector
	
	
	local humanoidRootPart = Tool.Parent:WaitForChild("HumanoidRootPart", 1)	-- Add a timeout to this.
	local myMovementSpeed = humanoidRootPart.Velocity							
	local modifiedBulletSpeed = (direction * BULLET_SPEED) + myMovementSpeed	-- We multiply our direction unit by the bullet speed. This creates a Vector3 version of the bullet's velocity at the given speed. We then add MyMovementSpeed to add our body's motion to the velocity.
	
	-- Prepare a new cosmetic bullet
	local bullet = CosmeticBullet:Clone()
	bullet.CFrame = CFrame.new(FirePointObject.WorldPosition, FirePointObject.WorldPosition + direction)
	bullet.Parent = workspace
	
--this is where it actually fires
	if PIERCE_DEMO then
		Caster:Fire(FirePointObject.WorldPosition, direction * BULLET_MAXDIST, modifiedBulletSpeed, bullet, Tool.Parent, false, BULLET_GRAVITY, CanRayPierce)
	else
		Caster:Fire(FirePointObject.WorldPosition, direction * BULLET_MAXDIST, modifiedBulletSpeed, bullet, Tool.Parent, false, BULLET_GRAVITY)
	end

The bullet fires in the right direction, but the bullet's rotation is always the wrong way. I already tried putting a script in the bullet that kept it always rotated the right way, but that didn't fix it.