If your TPS was way off and you had a custom map made for your bike at that time, resetting your TPS would "shift" that current map. If you are using a map that wasn't generated on your bike when the TPS was way off (one from the website, as an example), the map would assume that the TPS was set correctly in the first place.
In short, make sure a map that wasn't custom-made for your bike is loaded. The CO trim shouldn't need to be adjusted.
Easy way to think of this stuff is:
for any given map, the output of the TPS shifts your position on the map horizontally,
the CO trim moves the entire map up or down.
All that being said, how did you determine that your TPS needed to be reset?