After accidentally changing history, Brainy and Nia plan to go back and stop CJ from freeing Tork from imprisonment. But the time of day is different, and the effort to disable CJ's drone indicates they're trying to stop her from even spotting Kara and Tork's ship in the woods in the first place.
When Kara and Kenny are exchanging corsages, the song "Bulletproof" by La Roux is playing. This song was released on June 21, 2009, but the events of this episode took place almost a month earlier on May 26. Assuming the timeline for the song follows that of our Earth.