Doesn't sound pointless to me. The current behavior tripped me up at a Nissan dealer. I stopped there because I figured I needed about half an hour's worth of L2 to make it home. I hit the timer override, plugged it in, and my wife and I went inside to the waiting room. Forty five minutes later I told her we should be OK now, so we went out, I unlatched the nozzle, hung it up, and we started off. Just two miles later, while on the freeway, I got the "Low Battery Warning". What? I'm eighteen miles from home, and I got that warning before about a mile before I got to the dealer. So I got like three miles charge in forty five minutes??
Well, I slowed down, got off the freeway when I had a chance, and took the "old highway" the last ten miles home at 35 mph. I made it, probably just barely before I got to Turtle. Thinking back, I had noticed that I was parked next to a new LEAF where its presumed new owner was being shown the ropes. The only explanation I could come up with was that while demonstrating how the charging station works the Nissan specialist had temporarily unplugged my car and plugged it back in. Yup, that canceled the timer override, so no more juice for me after that.
Since then I have made it a rule to NEVER use the timer override button in a case like that. Instead I go down through the console menus and turn off the timer there, hopefully remembering to turn it back on later. What a pain!
P.S. Someone here later pointed out to me that another solution is to set up Carwings notification to send my cellphone a text whenever charging stops. Not a good solution for me, since I have to pay 25¢ for every text message I get, and I would be getting one every night. (My wife and I are really old, and have never learned how to talk with our thumbs.)
End of April 2013: Traded my 2011 SL for a 2013 S with charge pkg.