I have believed since Phantom Menace that "balance" meant the destruction of the Jedi. Knowing what Anakin would eventually become and what he'd do to the Jedi order made it seem pretty clear to me that his job as the chosen one--bringing balance--was not about extending the influence of the Jedi Order throughout the galaxy.
Yoda mentions the growing arrogance of the Jedi in AOTC. That's the first clue. Hearing Yoda suggest the prophecy may have been misread was the clincher.
After AOTC and ROTS, my view of the noble Jedi Order was completely turned on its head. They were arrogant and exerted way too much influence on those around them, poking their fingers in every pie and manipulating political situations as they saw fit. And I do believe this was intentional on the part of Lucas.
If Anakin was indeed conceived by the Force (ignoring the theory he was conceived by Palpatine), then it's reasonable to assume that his actions were driven by the Force and his ultimate purpose was the will of the Force. As Scruffy said, the Force doesn't obey the artificial morals set forth by humans. The Force's natural state is a state of balance, and if it's out of balance, it corrects itself through whatever events are necessary.