Software problem with line 12 - "Other than cash or check" on Schedule A

When I went to enter items in Schedule A in Forms, line 12 already had a number in it, 173.  I tried to get rid of it, but clicking  on any of the dropdown items did nothing.  I decided to try using Its Deductible, which worked, but  I could only add the amounts to the 173 in Line 12. Unfortunately, that threw me above the $500 limit!  So I clicked on the box again and found I could use the override.  I changed my entry to the right amount, but I know using override is not good. Does anyone have any idea what to do??

I've been pulling my hair out for hours.........