In B2B-Buy do hard reservation happens at subinventory level or Org Level ?

Summary:

Hi Team,

1. We created new Item# b2b11 (Testing B2B-Buy Use case)
2. Created SO with 2 qty for this item: SO# 1027, this created , Req# 95, PO# KR-10000252, received this PO now in Subinventory# E929
3. After this, Manage Item qty UI at subineventory# E929 was: 2,0,0
4. Created new SO with 20 qty, SO# 1028, this created Req# 94, PO# KR-10000253, received this PO in subinventory# E926
5. After this in Manage Item qty UI at subinventory#E926, was: 20,0,0
6. Cancelled the second SO which had 20 qty
7. After this in Manage Item qty UI at subinventory# E926, was: 20,20,20, subinventory# E929 was: 2,2,2 & Org level was, 22,20,20

Is this expected behavior ?