I think that where and how the line is tied onto the lure is a major factor in it's performance in the water, but not necessarily "the" factor that will trigger a strike.
You'll notice that most bottom bouncing jigs have a 60degree angle on the eye which, supposedly, positions the bait so it is easy to scoop up by fish at a natural angle. Also, you've mentioned that different position of the knot, adding a split ring produces variable action on a specific lure. If it's not running "true", than a tweak or change and pending results will determine if you keep it in the water longer.
Confidence in the bait you are using = keeping it the strike zone, will intice an instinctual strike response. If the fish aren't interested, it's other factors that come to play, not a commentary on your presentation.
Now get to the lake, stop casting in the pool....lol.
reefrunner