What happens to Gretchen at the end? (spoilers)

I watched the movie on DVD (it was called Cyborg Conquest)

Near the end Gretchen (Frida Farrell) is with Lady (Stacy Dash) before the explosions start and they run away. Then they show the cyborgs exploding all around the town. Between these scenes there is a brief shot of Gretchen riding a bike in the mall with a blonde girl sitting behind her while something explodes in the background.

This scene doesn't make any sense. There were two blonde girls in the mall, they were on the same bike and the other bike had two different characters. Her cyborg clone was destroyed earlier, so that couldn't be that. Also her character was supposed to be on a different location with Lady when the explosions take place. They just edited this two second clip into the film that really doesn't make any sense.

And Gretchen doesn't show up in the last scenes. I don't think they killed her, it's more likely that something has been cut from the movie but this way it's absolutely nonsense. Anyone else noticed the same thing?