The "Column width and alignment" feature of org-mode (http://orgmode.org/manual/Column-width-and-alignment.html) is not working in the latest GIT version (as of Fri Dec 8 20:06:59 BRST 2017).

I have just tested it in the table

  |---+------------------------------|
  |   | <6>                          |
  | 1 | one                          |
  | 2 | two                          |
  | 3 | This is a long chunk of text |
  | 4 | four                         |
  |---+------------------------------|

which is actually the example given in the manual.  It fails under the latest version (column width is unchanged upon alignment) but it works OK in an older version (Org version 7.9.3f - GNU Emacs 24.3).