Today, we have found 4 items, that at the moment of creation, also each created an inventory adjustment and adjusted to the wrong GL account, and put a message in the memo box fomatted as follows (part number) Opening Balance.

The steps for creating these items were no different than any of the other 17000 items in our database.  But we have 4 that created these adjustments automagically.  On different days.  first was 8/25, second 10/15, third 10/22, last 10/27.

The GL account they auto-posted the inventory adjustment values was 9999 Opening Balances.  Which is an account originally created by our NS implementation team. 

Any thoughts on what could be causing this?  As usual it is tough to track down due to its intermittent nature.