I'm working in Excel 2013. Since Monday morning, I've begun having a problem with the fill series function. No matter what I do - holding down shift or control keys while dragging, just dragging using fill handle - I can't get the numbers in a column to advance. The program just copies the same number into each cell. If I want to advance the numbers, I have to type in each number by hand, which can get time-consuming. Also, while last week dragging with the fill handle resulted in an Autofill box, this week all I get is the Quick Analysis tool box. I've tried restarting the program, turning off QA, and turning the Enable Fill Handle off and back on. None were successful. Has anyone else had this issue? If so, how did you fix it?