Server multiple times,what is wrong?

Hi
i have some server multiple times, what is wrong?

page Admin Admin
group-only conn|cpu|memory|disk|msgs|procs|svcs|iishealth|http|webagent|trends <I> Win32 Systeme </I>
10.28.a.xx      foo.bar.blablub.de      # http://foo.bar.blablub.de


page produkt Produktivsysteme
group-only conn|cpu|disk|msgs|procs|svcs|iishealth|http|webagent|kfz|kv|lv|phv|trends <I> Win32 Systeme </I>
10.28.a.xx      foo.bar.blablub.de      # noconn http://foo.bar.blablub.de

In bbtest i get this errors:
Host foo.bar.blablub.de appears twice in bb-hosts! This may cause strange results

what is the cause of this?

thx
wdsl