The Hide Duplicates property of a text box does not suppress the printing of
duplicate records. All it does is leave white space on the next row of the
report if that text box had the same value as on the previous row.
If you are getting multiple copies of the data, you need to look at the
query (or table) that is the Record Source for your report. If you want to
suppress the duplicates, you need to modify the query, such as making it a
Totals query (Total on View menu in query design), or setting the Unique
Values property to Yes (in the Properties box in query design.)
Or, you may need to change the structure of your report so that some of the
fields are placed in a Group Header or Group Footer where they appear one as
a heading over all the records that are printed in the Detail section.
(Choose Sorting And Grouping on the View menu in report design.)