Reorganizing Markers

I am using Sony Vegas Pro 10.0 in a windows xp platform. I made a video with 12 markers (chapters) and burned it with DVD Architect 5.0 and it works great. Now I decided to polish the video a bit and end up adding some stuff to the beginning. So now what used to be marker 1 (at old location 00:00:00;00) should be marker 2 (new location 00:00:47;17) and I was hopping Sony Vegas will automatically reorganize the marker numbers. That is not so, when I added a marker before the old marker number 1 instead or organizing them all it numbered that marker 13. I have not being able to find a way to have Sony Vegas reorganize those chapters in logical order... How can I do that or do I have to move the old marker one back to the 00:00:00;00 location and then just rename the text for the chapters?