[libreoffice-users] LOOKUP Function: Bug or Finger Trouble

I have attached a spreadsheet that
        demonstrates my issue well.  Yes its complex.


Column A is a concatenation of columns B and
        C.  I use column A as a key for the cells in columns B and C.


Columns E and F represent how I want to use
        the list created by columns A..C.


Column E uses data validation pull down list
        to select the key from column A.  The LOOKUP function in column
        F is used to return thesubcategorymatching
        theselected key.  Only it doesn't
        always work as intended.


Have I found a bug or am I being a nob?


Many thanks


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