Spreadsheet column headings not aligned with columns
I've absolutely no idea what I did, or how to reproduce it, but as of now my spreadsheet looks like this:
I've tried deleting columns, and inserting columns - makes no difference. I've tried closing and opening the spreadsheet view - again no difference. The left-most column (with 2, 4) is column A, and the next column is column B. I've tried using "Refresh Views" but again that makes no difference.
Highlighting column B looks like this:
How can I get the column headings to re-align with their columns?
Thanks very much,