stupid, stupid, bank....

so i evidently overdrafted my bank, but here is the catch....i dont know how...my register matches the online banking perfectly, everything is correct, all my withdrawls, deposits, everything...so how in the crap did i overdraft??? okay that is the first crappy thing, second...i thought that i had signed up for overdraft protection, but evidently i did not sign up for that (even though that is what is was told i signed up for, i "signed up" for overdraft limit, which just means that the bank will cover a $500 overdraft but i have to pay it back and i get charged for it), here is the catch...b/c i evidently overdrafted 3 times (about $5 each time) i got charged 3 times for my overdraft...total about $90 for 3 little transactions, that should have gone through according to my correct register...and the bank, what will they do, of course....nothing....gotta love america