These are the FACTS about the population trends for Augusta and Columbus repectively according to the US Census.
Augusta-Richmond County
2000 pop 195,182
2006 pop 189,366
the "gain" you are talking about was a whopping 200 residents from July 1, 2005 to the latest figures from July 1, 2006.. but as you can see the overall population has declined by almost 6,000 ppl since 2000..
here's the table from the census website:
http://factfinder.census.gov/servlet/DTTab..._EST_G2006_T001
Columbus-Muscogee County
2000 pop 186,291
2006 pop 188,291
with the exception of 0f 02 to 03 Columbus-Muscogee has gained in population for each year and is up from the 2000 census
http://factfinder.census.gov/servlet/DTTab..._EST_G2006_T001
In the last year of data alone, Columbus gained almost 3,000 residents compared to 200 in Augusta..this is why it is very likely that by the 2010 census, Columbus will outrank Augusta in population.
What part of this is so difficult for you to comprehend??