This seems like a (minor) bug:
version: 3.2.137
car OS: 2000 fbody
computer OS: windows XP
In the editor, open IAT Spark table, and also open a compare file for the same year. Look at the main table, it's fine; look at the compare table, it's fine; look at the difference table, the horizontal temp scale has the wrong values, and the table values are wrong. Does the same thing for any compare file I use.