Okay. I just formatted a document in 7.2 – document was the expected 1998a, 1998b and 1998c – updated to 7.3 and yep – in a library with only 3 records I constructed, when I updated the bibliography, I got 1998a, 1998c and 1998e as the years for APA 6th output style. Not sure if it is the style or endnote yet. will play around a bit more
will update just the other thread on my experiences. http://community.thomsonreuters.com/t5/EndNote-How-To/Multiple-items-in-same-year-by-same-author-not-listed-correctly/m-p/125349#M21970