I have a reasonably complex workbook that has just started behaving strangely. For example, on one sheet, I merged a range of cells and entered a paragraph of text. Bizarrely, the merged cells and entered text also shows up on multiple other sheets in the workbook.
How can this be? I have never encountered changes being duplicated across sheets. Is the Excel file corrupted? Does anyone know how to un-corrupt the sheet, if that is what has happened?