I couldn't figure out how to auto-sort this area according to the rolls, but all you have to do is highlight all the rolls in the 2 columns and have Excel sort it for you from highest to lowest and wa-la.
I'm not sure how well versed in Excel you are, but here's the initiative tracker I use. There's probably a bunch of stuff in there you might want to shuffle into yours.
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Buttons down the left, are: Roll initiative, clear (clears the top and autofills the party information from below), move up and down (moves the selected character up or down in the initiative order, individual dice (rolls the associated die), roll bones (rolls all the dice in the bone roller at once), save/load (juggles preset parties or encounters with the second sheet), clear party, clear XP.
Green cells are where you're "allowed" to type in information. Entering something in the "additional" slot highlights the affected person so they're easier to pick out of the crowd. Damage entered in the "damage" column automatically gets subtracted and tracked from hit point totals, which in turn remind you when monsters get bloody and/or dead (by either turning red or greying out.)
The "Party" box on the bottom left is the main place you enter your party information (I keep track player ACs so that I can fudge rolls up or down as necessary.) The +% adds a percentage bonus to the XP total, and the XP totals are rounded up to the nearest value of 5 (I'm silly like that.)
The "XP Worksheet" on the bottom right is probably the most self explanatory. I'm not going to bother you with an explanation and more parenthesis (I'm lying, yes I am.)
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http://www.npzr.org/users/nytmare/dnd/Initiator.xls
[EDIT - also:
voila -
http://www.merriam-webster.com/dictionary/voila]