Yup, I was saying re-re, lol. It is easy to nick one of those o-rings. The oil rail needs to be lowered on as straight and as evenly as possible. Oil up the injector tops!! Not quite getting a good seal on the ball tube seal is a possibility also. Good idea to check. A lot of techs actually don't recommend messing with those unless they are pretty loose.
I have the parts to "re-re" seal the injector, it certainly isn't going to hurt anything. I'll do a better job of lubing the ball tubes up when installing the rail. I did notice that the rail wasn't exactly seating evenly so I also want to check to ensure there is nothing in the way, like an injector wire as well.
We'll give that a try and see what happens... That passenger side is a little harder to get the torque wrench into the back lower bolts but that shouldn't have the affect of a leaking #3 injector... but who knows...