Quote:

I moved [drastically] left and nothing changed.

Above a certain offset (should be 10 degrees), the instrument shows you its max deflection of the needle, so you can't see if you are 10 or 70 degrees off for example. This might explain the reaction after "correcting" your course in the way you describe it.

Maybe you want to believe me that the whole navigation thing in aviation is a big (and interesting) book, including some knowledge and maths, together with some rules to learn.
Personally, I get the impression that you've read about two lines of that thick book and though "ah, that must be it, lets fly then", letting this nice book fall back to the floor and entering the cockpit. No offence intended.
We all had (or still have) to start on this topic, that's what makes the flying interesting since you can train and try all kinds of things in the sim. Now, the training comes from actually understanding what is happening. The Learning Center of FSX stays a tip (hint, hint).

So I really, really recommend reading some things after feeding e. g. Google with your interest in "VOR Navigation". For the people who don't like to read, videos will cover the whole thing too, so there actually is quite some stuff to enjoy while the current technique of trial and error together with the short explanations possible in forum posts won't lead to a good end, but a fragmented and diffuse one.  :) The topic gets described on every good aviation site, no need to copy it into the CS forums as if it was something newly discovered.

If you're up to reading a bit, here's a useful link to enjoy some free available sources. http://www.flightsimbooks.com/

Sadly, the whole FMC driven planes in the sim are often used to let people start the wrong way. They jump in the 767, feed their computers to some extend and let the plane fly itself.
No real Pilot would start this way, they all go from the basics to the advanced things. You won't understand all advanced items until you haven't understood the basics which, for example, the navigation skills are.
I'm learning something new every day, so don't see me as some experienced guy there. But I'm at least aware of where to start.  ;)

Concerning your very special problem (which will be just one in the whole chapter, which isn't a problem of course), it would help to determine which Course you are supposed to go and on which Course you are currently moving. So you can calculate an intercept heading, leading you to the desired Course (and therefore route) in the shortest amount of time.

Ok, here's some offence, but that one with  :P, so don't get upset.
# Part II — Instrument Flight

   * Chapter 10: The Hazards of Flying On Instruments Without Knowing How
http://www.flightsimbooks.com/flightsimhandbook/