Hi,
Please check the team membership. Users could get additional rights due to following reasons:
1) Team membership. Team could have the role assigned which gives you additional access.
2) Specific record is shared with the user. In that case user will be able to see this record.
3) Specific record is assigned to you. In that case user will be able to see this records.
Hope this helps.
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Minal Dahiya
blog : http://minaldahiya.blogspot.com.au/
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