If all of the items in the allocations screen are formed purely of Disbursements and Office Credits, which were used to pay them disbursements, and the screen will not allow you to select one against another and match off. Then try the following steps:
From the DPS Home Screen, select Client Postings.
Select Bills.
Click Select Disbs and pick up all DIsbursements items in a bill, including the Office Credits paying those disbursements and Post.
The bill should make the allocations for you and the ledger allocation screen should clear these items down.
If you still encounter issues, please raise a new case online and reference the title of this article.