Problem with fastcast, rays going opposite way

Help and Feedback Scripting Support
1

Hello, i’ve recently started using fastcast for my blood system, but when i try to make rays on 4 different locations 2 of them go upwards for some reason.
Here is the code.

local fc = require(game.ReplicatedStorage.FastCastRedux)
fc.VisualizeCasts = true
local cast = fc.new()
local MaxDistance = -1

local CastParams = RaycastParams.new()
CastParams.IgnoreWater = true
CastParams.FilterType = Enum.RaycastFilterType.Blacklist
CastParams.FilterDescendantsInstances = {script.Parent}

local castbehaviour = fc.newBehavior()
castbehaviour.RaycastParams = CastParams
castbehaviour.Acceleration = Vector3.new(-18,-18,-18)
castbehaviour.Gravity = 5
castbehaviour.MaxDistance = 5
castbehaviour.ExtraForce = Vector3.new()
castbehaviour.HighFidelityBehavior = fc.HighFidelityBehavior.Default
castbehaviour.HighFidelitySegmentSize = 0.5


hum = script.Parent.Humanoid
local curhp = hum.Health

hum.HealthChanged:Connect(function(newhp)
	if curhp < newhp then return end
	local difference = math.abs(curhp - newhp)
	print(difference)
	local direction = script.Parent.HumanoidRootPart.CFrame.LookVector - Vector3.new(0,1,0)
	local direction2 = script.Parent.HumanoidRootPart.CFrame.RightVector - Vector3.new(0,1,0)
	local direction3 = script.Parent.HumanoidRootPart.CFrame.LookVector + Vector3.new(0,1,0)
	local direction4 = script.Parent.HumanoidRootPart.CFrame.RightVector + Vector3.new(0,1,0)
	local origin = script.Parent.HumanoidRootPart.Position
	local modspeed1 = (direction * -10)
	local modspeed2 = (direction2 * -10)
	local modspeed3 = (direction * 10)
	local modspeed4 = (direction2 * 10)
	cast:Fire(origin,direction,modspeed1,castbehaviour)
	cast:Fire(origin,direction2,modspeed2,castbehaviour)

	cast:Fire(origin,direction3,modspeed3,castbehaviour)
	cast:Fire(origin,direction4,modspeed4,castbehaviour)
	curhp = newhp
end)

cast.RayHit:Connect(function(cast, raycastResult)
	if raycastResult then
		print(raycastResult.Instance.Name)
	end
end)

Here’s a screenshot of what happens:
image