When you use the Adjust Quantity/Value on Hand for Serial/Lot numbers, QuickBooks saves the transactions, however it doesn't update any lists to recognize the serial/lot numbers. When you enter/edit a transactions, the drop-down list doesn't contain the serial numbers entered through the adjustment.
This issue has been resolved in the latest release for QuickBooks Enterprise Solutions 14.0.
Update to the latest release:
Go to the Update to the Latest Release web page.
IMPORTANT: Make sure your product is selected. If not, click the Change link and select your QuickBooks product.
Select and follow the instructions for one of the update options: