Same problem here. What makes it worse is that a check of the audit log revealed that "System Administration," which I assume is Quickbooks Online Payroll (which is just a bunch of payroll clerks behind the scenes), added the Cash account and directed the payroll transactions to it, causing the mess in the first place. Fortunately, I only have a handful of transactions in this rogue account, not hundreds like some, but the fact that someone from a service I paid for messed it up is pretty aggravating.