He knew it and was taught it but, it was his 4th training event in one year due to displacements and he had just come off the CRJ where you use them on every landing. Also, in training you use them on 95% of the landings because you are either single engine, on a wet/contaminated runway, or on a short runway, so there was a big negative transfer of learning.
Ahhh damn that sucks. I can see that. Unfortunate.