Hi,The observed trend is expected and correct because of the way Adobe
Analytics unique visitors are calculated in different date period
granularities. Within each defined date granularity (day, week, month)
the unique visitors report will de-duplicate the count to a single
visitor. Therefore at a day level you will observer a higher count over
weekly UVs and monthly UVs.Help Article Link on Unique VIsitor
Reports:http://microsite.omniture.com/t2/help/en_US/reference/reports_unique_visitors_v15_...