What to do when Article numbers are unreliable?

[David Kastrup]

Hi,

with my current news provider, it appears like I get one of a bunch of
news servers on each connection, and the relation between article
numbers and articles is not kept.  That means that whenever I type ^
in order to go up in a thread which I have read before, I get an
"article has been cancelled or expired" message.  A nuisance.  The
same happens when trying to access old articles.

Is there a possibility to forget the "article id"-"article number"
correlation whenever the connection to the server closes?

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum