Why are they red? Did you manually color the cells or is it a result of Conditional Formatting?
I'm sorry I don't know what Xcelsius is, but is there a condition you could write a formula to count by?
No, what I am asking is what is the reasoning behind the different colors? Is it based on something?
Take a look at this video. It should help you figure out your issue.
http://www.datapigtechnologies.com/flashfiles/SortonColor.html
Alan