Yes, itīs a typo, reverse thrust was cancelled at 60 knots. The training that is mentioned at the end of the report includes demonstrating the difference in time it takes to accuire full reverse thrust when the thrust reversers have been stowed compared to if just reduced to idle. Canīt remember the exact figure but in the region of 12 seconds longer. A pretty long time when you are ice skating down the runway and the green stuff at the end is approaching.
Also interesting to read that the crew gets "kudos" for pulling the CVR. I guess the threatening letter that came out a while back "do it or you are fired" had some effect...