Phantom usenet headers?

TB 2.0.0.12 (20080213) XP Pro+SP2+all updates.
I subscribe to 5 newsgroups, the most active of which usually has less 
than 200 new posts per day; I usually mark them all read after reading 
those of interest. A week or so ago the title line said something like 
183 unread, but when I went to download the headers was shocked to get a 
message saying something like 23678 headers to download. I downloaded 
the first 500 and got a similar message with another NG when I expected 
to download just 13 messages. Despite setting them all as "read" it 
happened again the next day - then I started to get messages like "This 
NG doesn't appear on the server, do you want to unsubscribe?".
Thinking that this was a problem with my news-server I switched to one I 
used to use but gave up because of speed issues. It worked fine for a 
day or so, but started to behave the same today. For example, it 
currently tells me there are 175 unread messages on one NG, but when I 
attempt to download the headers it says there are 23347 new message 
header to download.
It seems strange that 2 completely separate servers (one in Poland) 
should start misbehaving at about the same time.
Is this a TB problem?

-- 
Regards, Gary Wooding

lemel_man schreef:
> TB 2.0.0.12 (20080213) XP Pro+SP2+all updates.
> I subscribe to 5 newsgroups, the most active of which usually has less 
> than 200 new posts per day; I usually mark them all read after reading 
> those of interest. A week or so ago the title line said something like 
> 183 unread, but when I went to download the headers was shocked to get a 
> message saying something like 23678 headers to download. I downloaded 
> the first 500 and got a similar message with another NG when I expected 
> to download just 13 messages. Despite setting them all as "read"
it 
> happened again the next day - then I started to get messages like
"This 
> NG doesn't appear on the server, do you want to unsubscribe?".
> Thinking that this was a problem with my news-server I switched to one I 
> used to use but gave up because of speed issues. It worked fine for a 
> day or so, but started to behave the same today. For example, it 
> currently tells me there are 175 unread messages on one NG, but when I 
> attempt to download the headers it says there are 23347 new message 
> header to download.
> It seems strange that 2 completely separate servers (one in Poland) 
> should start misbehaving at about the same time.
> Is this a TB problem?
> 

Right click on the newsgroup folder, select properties, click on the 
renew index button.

Regards,