Hmm, looks like there is some mess in teams list. As I see it now the L'Alliance Francophone team (teamid=24) is also on 20 and 21 rank.

There is another weird problem with my team (Boinc.sk, teamid=34 -> probably the last team at this moment) it is not showing in the list of all teams. However it appears in list of unclassified teams.

For me it looks like bug in selecting which teams to show on which screen.

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I can answer to the second part of this.
Newly created teams often do not appear on 'all teams' page, even if they do on other pages. I observed this in several BOINC projects.
--edit--
Your team is on the list now. Just remember, that among teams with no credits, newest teams are listed first.

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Hmm, looks like there is some mess in teams list. As I see it now the L'Alliance Francophone team (teamid=24) is also on 20 and 21 rank.

There is another weird problem with my team (Boinc.sk, teamid=34 -> probably the last team at this moment) it is not showing in the list of all teams. However it appears in list of unclassified teams.

For me it looks like bug in selecting which teams to show on which screen.

Adding to what Mchl has already mentioned, to lower the load on BOINC-database, team-pages and so on is generated when needed and cached on web-server for some time. This means different pages isn't generated at the same time, and this gives instances there a team, computer or user is either showing-up on 2 pages, or ocassionally on none of the pages at all...

Hmm, looks like there is some mess in teams list. As I see it now the L'Alliance Francophone team (teamid=24) is also on 20 and 21 rank.

There is another weird problem with my team (Boinc.sk, teamid=34 -> probably the last team at this moment) it is not showing in the list of all teams. However it appears in list of unclassified teams.

For me it looks like bug in selecting which teams to show on which screen.

Rosetta did this as well,
my team moved from 21st to 20th (a long time ago now) and went missing for a while, while the ex-20th was now at both 21st and 20th

so I would be inclined to say it a boinc 'stats' problem and not specific to Ralph

Also not a newley created team thing

Ingleside's seems to answer it (I assume that's project web server cache as no amount of page requesting/forcing solved it)

Only thing I can think of would be to put a check in place on table updates for the 20/21 40/41 ... rank changes then do an adition refresh of the corresponing page, of course I have no idea if they could keep server loads down to what they like, but it is a noticable 'bug' (athough if it is intended I guess it's a 'feature' :)

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This is a boinc server package issue. I've seen it on many projects.