This problem has been flagged up before: http://orgmode.org/worg/org-issues.html#mid-87pqt04qg1-2Efsf-40gmail-2Ecom
It's causing me headaches at the moment, so I'm trying to see if I can find a solution. The proximate cause of issues with double-width characters in table fields (they also mess with justification) is that the contents of the fields are propertized with a length based on `length', and not `string-width'. So you get this: #("《蛙》" 0 3 (fontified t line-prefix #(" " 0 4 (face org-indent)) wrap-prefix #(" " 0 4 (face org-indent)) face org-table)) 3 is the number of characters in the string, but it takes up 6 columns of screen width. That messes up justification. I can't for the life of me figure out where that number is getting added to the string! I tried changing `length' to `string-width' in all manner of org functions, such as `org-add-props', but could never get that number changed during the fontification of the org tables. I wouldn't be surprised if this is something outside of org, or if "fixing" it would lead to more troubles, but does anyone have any ideas about this? Fixable, or not? Thanks! Eric