When Chase hits Adam with a force blast, Leo is seen in wide-shot with his arms up in the air, but when the camera cuts to a close-up of him, his elbows are on the counter.
Immediately after Chase and Adam get the Student of the Semester results at school, Bree runs Leo all the way back to the secret laboratory at super-speed. Forty seconds later, Chase and Adam saunter through the doorway of the lab as if the distance between home and school was nothing. No explanation as to how they can possibly arrive shortly after Bree and Leo.
The school bell rings and Chase no longer falls to the ground in auditory pain, as he did in Crush, Chop & Burn: Pt. 1. No explanation given for this change.