Shifting question
 

2010 roadster, no mods, auto

Last few days I have been see the car downshift at weird times imo. The most annoying is when I am almost at full stop it seems to jerk/downshift a sec before I stop. The other weird issue is at start I give her little gas and ever odd time car sits there and thinks about going for a sec then it kicks in.

Anyone have any ideas what could be causing this? I dont drive her hard or track the car at all. Got the car June 2011 and only has 7900 kms.

I am booked for service on the 31st before I store her fo winter think I may ask the dealer to look at the issue but little worried about being hosed.