Output Graphs: Repeating Text

I am trying to make a table for Plastic Limit. I am wanting to show all the inputs from Attb Readings that go into calculating the Plastic Limit. Since the data is the last two entries in Attb Readings, I am trying to use a DataSetKey to pull up from (1:4) and then repeat to the last entry. The Text Express on looks like this <<Lookup(<<ATTB READINGS.WC_Wt_Tare>>,<<DataSetKey(1:<<#>>)>>,0.00)>>. In the past I have changed the Repeat Variable Start to 4 since it is the fourth entry, now it looks like this <<Lookup(<<ATTB READINGS.WC_Wt_Tare>>,<<DataSetKey(1:4)>>)>>. Values do come up now but not the right values. Any suggestions to get the right values to come up.