Using:
Mod version: [NeoForge] Tom's Storage 1.21-2.1.1
Loader NeoForge 21.1.115

There might be a incompatibility issue between Functional Storage and this mod, i have a simple setup with Tom's storage (i think it simple). Basically i just a inventory controller with a crafting terminal attached to it, then around the inventory controller i have a dock from Bank Storage on the top, 4 chests from Iron Chests
to the left and a storage controller from Functional Storage
to the right. They all seem to play nice together as far as Tom's Storage being able to see all the items from the the different inventory and accessing them to craft. The issue I'm running into is between Tom's Storage and Function Storage it seems Tom's cannot read the correct item values that are stored from the Function Storage's "storage controller" it seem to double the count of what it really stored.... its not duplicating it just doubles the count. Seems to be working just fine with counts from the other 2 mods I'm connecting to it.

See my quick test with Sugar Cane in the images below, i cleared the network of any cane before testing...

Setup layout between the 4 mods

Zero cane in network

Adding 1 cane to storage drawer

Searching cane on terminal shows 2 cane

No matter the count actually stored in drawer, the terminal always doubles it... drawer with max came (512)

Terminal showing double the amount

You have two "Inventory Connector" like blocks. The Inventory Connector behind the terminal sees all of the drawers, and it sees the drawer controller as a separate inventory, so doubling the items in the terminal. You can just remove the drawer controller, or use the Inventory Configurator and skip the left most drawer, so it won't see any of them.