I suggest the following checks to confirm what you are seeing:
Open the file in 7. Select a layout to this table. (Make sure that Show Records From in this table lists an occurrence of this table). In the status area note the total number of records.
OPen the file in 11 and repeat these steps. Do you see the same total number of records? If so then you aren't getting any record duplication, but for some reason, the same layout is displaying the records differently with the two system. If that's the case you'll need to describe the design of your layout in greater detail here. Perhaps these are records displayed in a portal?