Check out Ethan's pic of him wearing them over-the-ear in post 133 to give you a better idea. The fit can vary a little bit based on ear anatomy and preference of angle of insertion.
If you prefer them cable-down then that's what you should go with though. You should go with what you prefer. If the swapped channels bother you, you can see if your mp3 players have an option to swap the channels. If there isn't such an option, you could build a tiny extension cable with the tip and ring wires wired backwards to correct the channels when wearing them cable-down.
I actually reviewed the pictures posted by dogears previously and noted that the markings are similar to mine. The reason why I brought this up is because I previously was using the UE Superfi 5 pros before the cord broke and noted that the nozzle on the superfi's were directed anteriorly which was the exact opposite of the DBA's. I also can get a more secure fit and better sound when putting the DBA's in reverse. So it's either the markings are in reverse or my ears are.