Inventory auto sort and stack?

[kram]

Really, and that is how it's always been. Any time stackable items are placed into an inventory (whether it be you or your retainers), the game automatically searches for a partial stack of the same item and quality and tops off the first partial stack it finds before overflowing into the next partial stack it finds (and subsequently any other partial stacks in turn) before creating a new stack.

Well I tried again it will not automatically stack items. If for example I will drag an item into my retainer's inventory. Still it won't stack. You have to find the item and stack them manually. Am I right?