Capital One is basically broken. Their website has so many broken functions and really no way to notify them about the failed functionality. Fox example, I wanted to download transactions for the last quarter. I could only get it do find the last 30 days, even when I repeatedly entered the dates for the first quarter. Just doesn't work.
If you dispute a transaction, the only way for them to allow you to dispute it is to cancel your card (basically preventing access to your account) rather than contacting the merchant.
If you are someone who has business accounts and personal accounts, you are only allowed to have one debit card, and it can only access one of your accounts (of your choice). But it's not possible for them to let you access your other accounts with your one card, and they won't give you a separate card to access your business accounts at an ATM, so it's just a waste.
The list goes on and on. I would highly recommend going to a different, full service back ~ their systems at least work.