[3.5] D&D Ability Problem

Recently during a game of 3.5 D&D, I noticed that my abilities are having some issues. They seem to be a bit off. I compared the macros from another game, and they both match up, but the modifiers for that particular character sheet don't seem to be right. In place of the Total ability score and mod, there is a typo that says "NaN." As the abilities are connected to the other stats on the sheet, no bonuses are being added, and only come out as "NaN" where the ability bonus should be. Is this a bug that's been happening? If so, are there ways they could be fixed?

Have you enter 0 in all the stat/modifier/skill boxes that are not used? Some macros require a number instead of a blank or text.

The way the ability bonuses for the D&D 3.5 sheet are calculated now is a bit different than before; for all rows showing a NaN, try over-writing all the numbers in those rows (ie delete the existing zeros and replace them).  Not sure why the system occasionally gets confused with the preset zeros, but it does.