I ran into this many years ago with the transaction reordering scandal, when KeyBank turned a series of transactions on a given day (that were all cleared funds, to be clear) that should never have overdrawn me, and left with me with roughly $100 in the bank, instead ended up with me being $400 overdrawn, thanks to an absolute slew of overdraft fees, that the bank (and I) refused to budge on.

My ChexSystems entry wasn't removed until there was a lawsuit against the bank.