Route back to the UK started off with a DCT to TRA, which is in the opposite direction to the SID.
Good point about questioning this on the ground. I didn't because one could not get a word in on the EDNY ground frequency, it took 5-10 mins just to get the call in to get the dep clr, and also the dep clr said 'contact Zurich on XXX.XX immediately after departure unless advised' so I just assumed they are getting everybody off on some SID that gets everybody out of the way, only to be handed over to Zurich radar... no problem.
Probably a combination of factors resulting on confusion. Nobody is perfect, well almost nobody
One learns. Maybe EDNY gave me somebody else's SID, and Zurich had the right one all along.