Issue description:

I build a very simple system with just a controller, crafting grid and a disk drive with 8 drives (1k and 4k)

I got around 350 nether quartz. When they system is empty it displays 0. When putting it all in it shows the correct amount.
But when i close the grid and re-open it it shows i got 1.200 from which i can only take out the 350 that i actually have. Even when reopening it still shows me the 800.

This happens for like 90% of my stored items

What happens:

Displayed wrong amount

What you expected to happen:

Show correct amount

Steps to reproduce:

1. Put items in
2. Reopen grid and see wrong amount

Version (make sure you are on the latest version before reporting):

• Minecraft: 1.16.4
• Forge: 35.1.37
• Refined Storage: 1.9.11

Does this issue occur on a server?
yes. Private server for 2 people

How did you make the disks? Duplicating disks in creative mode creates "linked" disks that access the same storage.

This was actually the problem. I had 4 disks with the same "id".