That sounds like it is likely to be a formatting issue. I would highlight the problem cell, right click on it and choose Format Cells. Change it to a simple selection like General and see if the problem is still there. Also, to make sure it's formatting, look in the formula bar at the top to see if the actual value that you have entered is still in the cell. It sounds like what happened is that the cell data type got changed to text and then a custom format was applied of just 0. If you apply a custom format with some text in it, it will just show the text in the formatting rather than the value in the cell. If you are looking to have the cells show a default value of 0 until a value is entered, let me know and I can tell you how to do that.