Fairly new Model S owner here just for a few weeks. Since we don't drive too many miles, I've only charged a few times (about once a week). Saw some weird behavior with scheduled charging yesterday. Last night I plugged in the UMC around 7 pm. I verified in the charging screen that charging is scheduled but not yet on. Teslafi.com also notes the car is in idle and not charging. Since I'm on a TOU plan with my electric utility, I set scheduled charging to start at 9:05 pm just after off-peak begins. Sometime around 8:10 pm, Teslafi logging drops out for about 17 minutes. However, from my utility meter logs, I see that the car started charging itself at that time, taking a few minutes to ramp up to the full 24A I set. When Teslafi logging resumes at 8:27, it confirms a higher SOC accrued during the missing data period. Since it's just an hour of partial-peak, not peak rates, I just let it keep going. This morning I disconnect the UMC after a full night of charging. The charging seemed normal except for the abnormal start time. I looked at the charging screen, and see that the charging is still set for 9:05 pm. However, the scheduled charging button is now set to "off". I know that it was set to "on" when I first plugged in the UMC, as it did not just start charging right away. Has anyone else seen this type of scheduling behavior?