New to the service and for the most part I like the app and website, however had one question/confusion. I can't seem to figure out how to edit a past set in the UI on the iphone App.

quick example of what happened this AM:
Was at the gym and just did one warm up set of Arnold Presses, went to log it before going on to set 2 and mistakenly put in 250 instead of 25 (It's 5 am, I am allowed ). Now, I couldn't figure out how to go back to set 1. I ended up having to go back to the routine screen, redo the entire exercise log again and then just delete the old one from the log menu later on...

Is there no way to edit a set in the currently executing exercise screen?