You're confusing where the ball goes with the play call. QB draw for example is often packaged with something else. So QB draw is not 1 play by itself but is an option based on the defense of a second play.
Slant is similar. In the run n shoot offense a slant can be a sight adjustment by the WR off any of the 5 base passing plays. So counting slant and post as separate plays just simply isn't how any of this works.
I've seen our tackles pull, but I've never seen them actually trap. Rather I've seen them lead through the hole, which is sometimes an adjustment made to certain fronts when running zone. For example when running inside zone against an odd front, some teams will automatically check to a double fold scheme that involves both tackles pulling inside on the same play.