AR Transaction Workbench - Line level adjustment

Hello

1. One of the transaction type in our system is set such as Natural Application = Yes and Allow overapplication = No

2. I created an invoice for $2,000 for the same trx type

3. I am able to create multiple line level adjustments with positive amounts for more than the invoice amount ($8,000)

4. Now my balance on the invoice is $10,000

Please confirm if the behavior of this scenario is expected?

Thanks