I found this bit of information from ehow.com that talked somewhat about my dilema. "Hydrogen sulfide gives off the odor of rotten eggs, and it appears in groundwater as a result of decaying organic matter and bacteria." Also that while low levels of sulfur in the form of hydrogen sulfide or sulfates are not immediately harmful, the odor and taste of the water is unpleasant.
I should also mention that my filter has a built in UV sterilizer. Not sure if that could have anything to do with it, but in theory, it may have killing that bacteria a.k.a. organic matter...I really have no idea and am just pulling at strings. For now, I'm making sure the UV sterilizer is off, and I'm replacing the filter floss and carbon and starting over tomorrow.

Do you think I should dump all the water as well?

*edit*
This is another link that talks about the sulfur smell issue I have.
http://www.barrreport.com/archive/index.php/t-8390.htmlHopefully someone a lot more knowledgeable than me can help interpret this. So far it looks like I may not be able to avoid doing a 3rd water change in the last week. I'm also wondering if it is all due to circulation issues inside the filter by me overloading it with way too much carbon.