ATF dipstick constantly says overfilled after taking out more ATF than I put in?
 

I've taken out about 6-8 quarts of ATF from my 07 Honda Accord, but I've only put in 3.5 quarts and the dipstick keeps saying it's overfilled when the engine's hot and the radiator fan has come on once. I'm now at the point where I can't drain anymore fluid and it still says it's overfilled. How do I fix this?