Math.randomseed not working as expected

[tin_nim (Null_Supressor)]

You can write your topic however you want, but you need to answer these questions:

1. What do you want to achieve? I want a random combination of chunk with weighted chance with math.Randomseed in which if the chunk position is the same and the seed is the same,Its gonna give the same result

2. What is the issue? WIth me adding the chunk posx and z then minus with the seed i get some stripe,Even with no weighted chance it occur,

3. **What solutions have you tried so far?**Ive tryed using another formula but i need it to be the same in the same seed and not repetitive,And also with Weighted chance

weighed chance stuff

local function getchance(tablestuff)
	local weight = 0
	for _,Chance in pairs(tablestuff) do
		weight += Chance.Chance.Value
	end
	local randomn = math.random(1,weight)
	weight = 0
	for prize,Chance in pairs(tablestuff) do
		weight += Chance.Chance.Value
		if weight >= randomn then	
			return Chance
		end
	end
end

Seed for each chunk

---Seed detemainer
math.randomseed(chunkPosX*Chunk.WIDTH_SIZE_X+chunkPosZ*Chunk.WIDTH_SIZE_Z+seed)