IF my caddy is losing trans fluid won't it leak out anyway if I overfill it a little bit?

I read the cold side dip stick and it read low, and filled it to full while cold but after running it in idle a while the filler tube was practically at the top and the dip stick read over filled. I tried to pump it out using a common garden sprayer but it took way too long to pump out just enough to make a cup of espresso as far as volume. Is it safe to say that the car could be driven anyway like it is? Sooner or later the fluid will go out the way it always has through the leak right?