If it is a dummy position glitch, then try making the dummy set vehicle to a random object so you can move it, then re-position it to where it looks right again. From what you are claiming, I believe I had the same issue as you so what I am saying above should help. By the way, this isn't the only game. I have used this aiming system in multiple games including "Hero's Remastered" and "Halo." You can also find my example project with just the system here:
http://alice.org/community/showthrea...ht=basic+mouse.
To be honest, I can't remember what I did because it was so long ago and haven't used it in a very long time. It was a modified version of anothers work as well which doesn't help me today to tell you what I did. Try looking at the link I gave you above and see if that helps. If you have any other questions, feel free to ask!