Profit and Loss Statement detail categories wrong?

SolsticeLight

I have two transactions that were from paid invoices that are showing up in the wrong account on the profit and loss statement. I have double-checked the item in the products and services entry to be sure it is assigned to the correct account. I double-checked the invoices to make they were entered correctly. I double-checked the payment to be sure it was assigned correctly. I check the individual transaction to be sure it is entered correctly - all are correct. Yet, the profit and loss detail has them in the wrong category. I've racked my brains trying to figure out why. If I look at the report for that account, those transactions are not there. Only in the profit and loss detail of that account, which also shows the incorrect starting amount. I'm starting to think it might be a glitch in the software. There doesn't seem to be anywhere else to look that might explain it. I'm at a loss. Any ideas?