DayManThere is so much conflicting info in this thread. So many people say to do what the shop tech says but I'm 6'3" 205 and charge pretty hard and found myself coming out of my bindings wayyyy more often than I would like, honestly making my risk for injury even higher due to ejecting all the time. I guess what a lot of people in here are getting at is that you should adjust as you see necessary from where the shop guys say to put it but I feel like just outright saying "Don't change to any other din other than what the guy who mounts your skis says to do no matter what" is poor advice.
Just saw this thread now and saw your post. Almost guarantee that either your Anti-Friction Device(AFD) under your boot toe is too low or your forward pressure isn’t correct if you’re pre-releasing when your DIN is correct.
Afraid there are lots of techs out there that seem to miss important steps and I’d recommend always checking the AFD height and forward pressure before ever raising the DIN.
A critical step often missed by techs when testing AFD height is to put pressure on the back of the boot to try and “wheelie” the toe up and THEN test the space under the toe/AFD with a business card/.5mm spacer. The AFD should be raised until until there is resistance in moving the card/spacer under the toe while still pushing the back of the boot back to eliminate any slack. Low AFD is a very common cause of pre-releases.
Forward pressure adjustment is usually a bolt on the back of the heel piece is adjusted till flush(Marker bindings) or until the edge of the heel lines up in a scribed area above the heel track(Tyrolia Attack). Another common cause of pre-releases but usually not as improperly adjusted as AFD height is.
Test the AFD height and look at the heel to confirm forward pressure settings and I bet one or both are off.