The HSA is an IRA-like instrument that is often held on your behalf by a bank (mine is). Since B of A distributed the funds, it's natural that they would have reported the distribution. And, normally, the distributions are done via via the debit card that they gave your for medical expenses.
Often, you may not get the 5498-SA (even though you should), but if you, like many, had all of your contributions to your HSA go through the "W" code in box 12 in your W-2, then you actually don't need the 5498-SA to complete your return - the information needed is all on the W-2.
