Maybe it is normal, but if I put the cursor anywhere in the 1st line (say) of this table
||---+---| || x | x | and press <TAB>, it becomes | | ---+--- | | | | x | x | which is not what I would expect. By contrast, if <TAB> on this one |---|+---| | x || x | it becomes |---+---+---| | x | | x | Further, by doing M-<LEFT> on the 2nd column, it becomes |---+---+---| | | x | x | and using <TAB> then does not change the table, which is the result I would have expected to start with. Org mode version 9.7-pre release_9.6.1-321-g44e1cb GNU Emacs 27.2 (build 1, x86_64-redhat-linux-gnu, GTK+ Version 3.24.30, cairo version 1.17.4) of 2021-08-07 -- EOST (École et Observatoire des Sciences de la Terre) ITE (Institut Terre & Environnement) | alain.coch...@unistra.fr 5 rue René Descartes [bureau 110] | Phone: +33 (0)3 68 85 50 44 F-67084 Strasbourg Cedex, France | [ slot available for rent ]