Yeah, 78 degrees is wayyy too warm. I read the online instructions and darned if it doesn't say 78*! So.. trust us, next time cooling wort to low to mid 60's prior to pitching is optimal, and keeping the temp there for a few days is a key to a good ale.
Not sure why that hasn't been revised. That dates back probably to the bad old days of homebrewing before people knew any better. NB should revise that number down on multiple recipes.
Edit: I see @sneezles61 is already on it!