I find that interesting. I sighted my 20 GA. Tracker II barrel in over the weekend also. I had to start at 25 yrds to hit anything, about 12" low at that distance. Backed up to 50 yrds and gave the rear sight 2 clicks and I was on the paper, 2 more clicks and vertical was right on. Windage or horizontal was a different story, I am all the way to the left on adjustment, it does hit where you aim, just looks funny. I do not care for the monster of a front sight, but I suppose this was not meant to be a precision sighting device. Quick might be able to tell you if they make more than one front sight for the Tracker II.
I shot about 25 rounds of Rem. slugggers and Winchester silver box (cheap). I did get the last 3 sluggers down to 2 1/2", probably my eyesight more than the gun or ammo. I did do a mild cleaning half way through the shooting session. I have now spent almost 4 hrs. trying to get the lead that was smooshed onto the lands cleaned out. I have soaked it several times with Gunslick foaming bore cleaner, even over night. I have it about 90% clean. Don't know if I will shoot the cheapy's again or not.
Good luck with yours, JamesIII