Do you know the 2 different part numbers? Mine is in now getting it done, want to make sure they didn't use the wrong fluid.My service manager told me when they did my first TSB (175) they thought they used the correct fluid that is in the current TSB (355). When he compared them they are both the same name (Mobil 1 Synthetic LV ATF HP) however on further inspection the part numbers are different. He researched the part numbers and found the newer part number is not the same fluid even though it has same name. It's a different formulation. He even brought the older formulation out to show me.
If you take your car into the dealership advise them of this because they may have some of the older fluid around and by name it's correct. They need to verify the part number.