Actually, it's perfectly fine if your password has many characters that Telepathwords is able to guess. The question is whether the password has a sufficient number of characters that are hard to guess. A 40 character password with 25 characters that are easy to guess is almost certain to be better than a four character password with none that Telepathwords could guess.
This is somewhat grammatically tricky to parse. A better way to phrase it would have been:
"If your password has many characters that Telepathwords was able to guess, attackers may also find your password easy to guess."