Your PayPal balance and your bank balance disagree because they are two separate accounts holding money at two different moments, and money moves between them on PayPal's schedule, not yours. A customer payment settles into your PayPal balance right away; that same money only reaches your bank when a transfer runs, which may be days later — and by then the amount has changed.
This is the timing gap, and it is the single most common source of PayPal confusion. On the day a sale happens, the money is in PayPal, not the bank. While it waits there, PayPal takes its fee, a customer refund might go out, and a dispute might freeze part of the balance. When a transfer finally sweeps to your bank, it carries whatever net is left at that instant — which is why a bank deposit almost never equals the sales that produced it. If you only ever record the bank side, you are recording the end of a story whose middle you never wrote down. Reconciling PayPal means capturing that middle: the balance that genuinely sits in PayPal between the sale and the payout has to live somewhere in QuickBooks, and that somewhere is a PayPal account of its own.