Adding as an answer so that I can show results.
Not sure if versions will have an impact, but I am using 2007
and it worked, seemingly fine. Using your data, here are my "Consolidate" results:
CON
TAT 8
T 14
TAG 13
GAT 5
Did you select "Use Labels In Left Column"?
Are you looking for something different?
Did you set up your table as a range, or use the "Format As Table" function?