Client running Timeslips 2017 has a very strange funds transaction.

Client running Timeslips 2017 has a very strange funds transaction. Transactions shows funds were applied but puts a negative in the not yet applied, should be $0
Can't undo the bill because another bill was run subsequently. The AR balance is correct $0. Ran rebuild AR and trust for the client. Did not fix. When run new bill for client shows prior balance.