Missing Column



I have a column that is not showing up on one of my spreadsheets and I cannot figure out how to add it. I created the field on a form associated with the spreadsheet. The other fields I created that way showed up as columns, but this one did not. When I try to manually add it as a column it says that that column name has been created already. I have checked and it is not hidden somewhere on the sheet. I had hidden and unhidden other columns and this one is not there. How do I get it to show up on my spreadsheet?

Thank you,