Adding skills to OGL sheet

I'm trying to add skills to the OGL sheet through the html. I go through the file by adding the skill every time I see other skills within the code, but when I upload it the ability scores and modifiers stop working correctly. The ability scores stop showing the current value, and the modifiers stop updating. Does anyone know where I'm going wrong?

How are you uploading or editing html in any way with a free account? Using custom character sheets is a Pro feature.

I'm not intimately familiar with that sheet, but I do know there are sheetworker scripts that are tied to just about everything on that sheet, and what you describe sounds like the sheetworkers are no longer operating.  Are you editing the sheetworkers at all to account for what you have added, or changing/creating duplicates of any attributes they may be looking for?