Excel 2007 - Problem with Custom Sorting

[Chrissya03]

For my spreadsheet, I always use the same 2 custom sort criteria, so Excel typically remembers what those 2 criteria are. However, the past 2 days, when I try to custom sort, the box comes up with about 100 levels of custom sort, and its the same 2 criteria that I always use, but its repeated over and over and over. What is causing this???