Not really a goof.
This goof : When we first meet Jo, she says that she hasn't seen her father since she was 9 years old. When she comes to the navy bar, she tells Carl Brashear that she pulled her father out of enough bars and she couldn't do it anymore, etc. It's highly unlikely that she was pulling her father out of bars at such a young age.
http://www.imdb.com/title/tt0203019/trivia?tab=gf&item=/title/tt0203019/goofs/gf0934656
...is fully plausible. My grandfather is a similar age/time frame as those involved. At 7 he was bringing his younger sister to bars to help him get his dad home...he even drove the car a few times. If she was 9 in later decades, I'd call bunk...but pre WWII? I believe it.