This is most likely because you are using a HelloSign for Gmail add-on. Our system automatically creates a new account for every Gmail address you sign into using Chrome or Firefox because you installed the Gmail extension on your browser, not on the specific email account.
Where it gets tricky is that you'll need to use Google Login to sign into both accounts. Which means that you'll only be able to sign into the HelloSign account that corresponds to the email you're signed into Gmail with.
Since that can be sort of confusing, we recommend resetting your password on one account so that you use your email/password to access one and Google Login to access the other.
Or you can reset both passwords so you're always sure what account you're signing into.
You could delete one of the accounts, but you will just create it again when you sign into that Gmail account using Chrome. So if you use multiple Gmail accounts on Chrome, taking one of our recommendations above is your best bet.