I think I get it. It’s not saying he flew 55 sorties a day. They are saying the carrier launched 55 planes a day.
What information do you think might be incorrect?
55 sorties per day for the fighter squadron (more than 3/day for each Hellcat) does seem very busy. Almost too busy.
55 Sorties per day for the entire air wing (Fighter, Bomber, Torpedo, and Scout) seems insufficiently busy for mid 1945.
See also my post #21.