This issue with the phrases really sucks.
Not because it's too much work to export and reimport, hell that's easy, but because you just can't forget to do it or you'll lose
days of work...
BTW Jelsoft seems to think to problem is with the coders and not with vB:
http://www.vbulletin.com/forum/showthread.php?t=176703
And over @ vBOrg "it shouldn't happen"...
http://www.vbulletin.org/forum/showthread.php?t=108876
http://www.vbulletin.org/forum/showthread.php?t=108680