This is fixed in ClarisWorks 1.0v3.
Undoing an insert column in ClarisWorks 1.0v2 or earlier does not restore the proper range in formulas.
1. Select a column which is referenced as a range in a cell formula in another column.
2. Insert a column.
3. Then choose Undo.
Result:
The proper range is not restored in the formula. The result is "#REF!" and the word "BADRANGE" replaces the range in the formula.