8 Character Limit?

I usually use 12 - 13 characters for my passwords, especially financial-related web-sites.  When I use the vault it did not send the right password.  When I 'show' the password it displays the correct 13-characters, but when I 'hide' it, only 8 dots appear.  Is it sending only the first (or last) 8 characters.  If so, is there a setting (or fix) to change that?

Bernie