I can definitely understand your confusion..especially since Cool whip contains corn syrup.. a thing to be avoided! Lite Coolwhip falls under the phase 1 "treats" and treats are limited to 75 cals. The 2 tblspoons of lite coolwhip that we are limited to comes to 20 cals, and more importantly only 1g sugar. . Since we are to look for foods that contain less than 3 grams of sugar, it fits the SB Way of Eating .
That being said, if you are very sensitive to sugars, and you find it triggers cravings you might want to do with out it or substitute it with some FF 1/2 & 1/2 and splenda and vanilla,salt and whip up to a nice froth or perhaps visit the SugarBusters forum for some ideas.
Here's a link to the Emergency Handbook for Phase 1.. it includes a list of Phase 1 foods! Enjoy Wendy and Pop in more often!
http://www.3fatchicks.com/forum/showthread.php?t=58182
Hope this helps ya~~~