You're right. I thought the same thing. Maybe they had it written in the script that way and they had to switch the camera angles which forced him to have to punch the dude on his other side instead... or something. :P
" Quick update, liked the episode, seems like Dexter is going to have a problem in Jordan Chase. One glaring discrepancy that I couldn't ignore and made me think of it for the rest of the episode - While Dexter was punching the douchenheimer who beats that girl, he was saying that he was punching him in the liver. This was obviously false because Dexter was punching him on the left side of his abdomen, and not his right. It really bothered me for some reason, may be because I'm a med student, but more likely because Dexter is a dude that knows the human anatomy pretty well. FOR SHAME! "
Very eventful episode though, although I'm sure many people didn't like it due to the whole Astor situation. I liked it though; it was a nice change of pace. The scene where Harry tells Dexter that he misjudged him was pretty huge. Who knows what effects that could have on Dexter's state of mind later in the series. Also, the whole part where he told Astor that he loved her. I was like, whoa son. Dexter, you're not allowed to love!
Oh yeah, and in the scenes from next week, Dexter and Lumen are caught on tape prepping for the murder. Oh noes!