LOOKUP a text string created from IF statement
 

I am using an IF function to create an array that is a LOOKUP vector:
IF(true,"Start",""). "Start" is returned only once in the array yet a LOOKUP
on this array returns the last cell value in the result vector. LOOKUP works
correctly if I remove all if the IF formulas and manually enter "Start" in
one cell in the lookup vector. It's as if the LOOKUP formula can "see" the
"Start" string in every IF function. How can I get LOOKUP to return the
result that corresponds to IF function result?