In hindsight, probably better if you couldn't free it by lighting up the rears which is harder in an auto, then worth getting something beefy to tow you for a bit to free it off if it happens again. A really wet day after you parked up would stick the pads to the disc. Thing is with a manual, you can be a lot more brutal, which is sometimes what you need.
DS2500's are not hard on discs, so don't see why you'd need them skimmed. Just a bit of heavy braking will clean them up. I admit, I just change pads and discs together as they seem to last about the same. My DS2500's still have plenty on them after 40K miles. Discs are okay too. Reckon they'll need changing at around 50K miles.