I have noticed that if I remove a hline in a org table used as a spreadsheet, the formulae for rows below where the hline was, change in a manner that makes them refer to the wrong row.
Since hlines are not counted as rows in the spreadsheet, removal of a hline should not change the formulae in the '#+TBLFM' line. I am using 'org-table-kill-row to remove the hline. Its doc string says that it can be used to remove a hline. My version is: Org mode version 9.1 (9.1-20-ga4f139-elpaplus @ /Users/alanwehmann/.emacs.d/elpa/org-plus-contrib-20170911/) -- Alan Wehmann alan.wehm...@gmail.com