Corrected entry: Chrissy is the leader of Spirit Week and is trying to organise it. We see her kiss her boyfriend Troy, and suck the life out of him a few days before Spirit Week. However, Chloe pulls up the file on Troy, and it says his date of death is June 20, 2002. This is highly unlikely, as Spirit Week is put on in the days leading up to homecoming, and homecoming is usually in late September or October.
Corrected entry: Clark is supposed to hide his powers from everyone. When the other swimmer in the final race starts to drown Clark uses his super speed to get him off of the bottom of the pool. Everyone who was in the pool area had their eyes on the drowning kid so somebody should have seen Clark just appear at his side.