Hopper Items Not Appearing In Chest

[Siqhter]

This is the slot code used in my custom container class:

Spoiler

/* Container Slots */
for (int y = 0; y < 2; y++)
{
    for (int i = 0; i < 9; i++)
    {
        this.addSlotToContainer(new SlotItemHandler(tileEntity.getInventory(), i + y * 9 + 9, 8 + i * 18, 35 + y * 18));
    }
}

If I remove the for loop and just make it a single row of 9 slots (like a hotbar) it works fine, I put the items in the hopper, they transfer to the chest, works great. When I create this for loop for another row above the first one, the items transfer from the hopper into the chest, but don't actually appear in the chest. The funny thing is, when I break the container, they do drop the items into the world just fine. I am pretty sure this is not a capabilities issue, because the for loop is the direct result of the mysterious disappearing of said hopper-transfer-items. Thanks.

[Draco18s]

Not enough code supplied to adequately diagnose the problem.

 

But it's probably here:

7 hours ago, Siqhter said:

8 + i * 18