Hi EESA
I take it account 5-2100 is the linked Cost of Sales account on the Item profile?
If yes, I have see this before. Don't recall exactly the circumstances. Normally MYOB posts the full value of the purchase to the Asset account. However in some instances in order to get the correct value into the asset account, part of the purchase is pushed directly to the Cost of Sales account. It had something to do with an adjustment or edit or reversal on a previous transaction for the same Item. It seemed MYOB kept a record of a shortfall and made an adjustment with the next purchase of that item. When I examined the figures closely, this unusual posting for the purchase did in fact give the correct outcome - I don't often say this about MYOB and inventory. I would suggest no further action required.
MYOB have since fixed the situation that caused this to happen and I won't expect this to occur in any transaction processed in the current version AR2024.3. I note your transactions are dated Sep 2023.
Regards
Gavin