I encountered the following problem with Endnote7, Word2010 and APA-style V6:
The first citation of a particular reference is shown in my document as “Xxxx et al.” and the second one with full name list “Xxxx, Yyyyy & Zzzzz”. But it should be the other way round.
So I deleted all citations in my document, deleted the reference in Endnote, I imported the reference again and inserted the two citations in Word again - the problem remains the same. 
What to do? Can anyone help?