This is normal behavior, if unexpected. If you drag the items from one group to another (or vice versa -- it's hard to know which to try first), they should all collapse into a single group.

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Sue Mosher, Outlook MVP
Author of Configuring Microsoft Outlook 2003
http://www.turtleflock.com/olconfig/index.htm
and Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
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>I imported many contacts from a web to outlook (CSV format)
> Now, in "view Contacts>company", there are two groups with same title:
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>
> many thanks