I noticed that my Awstats are completely off,

Unique visitors Number of visits Pages Hits Bandwidth
Traffic viewed * 1106
1792
(1.62 visits/visitor) 3220
(1.79 pages/visit) 5850
(3.26 hits/visit) 36.01 MB
(20.57 KB/visit)
Traffic not viewed *
1493 1499 21.96 MB

Plus im also seeing, that most of my traffic is not viewed. What is going on? And how can I fix it?