I think I now the reason of this, I think it's related to what I posted
here.
The changes I made will (when I switch to the new tables) have as a result that the last project that updates (during a stats update) will determine the name/country/url/team of a user. The current update goes from the oldest to the newest project (added to BS). I thought it was a bad idea to let the newest project determine these things, as it may not be configured yet. Therefor I reversed the update sequence from newest to oldest.
You may remember from a while back that I changed that a user could be a member of multiple teams in BOINC combined. That change and the one I did today resulted in the mass migration of users in teams in combined stats. Your members are not a member of your team in all projects (shame on them!).
If you look up the team member movement in the projects you'll see nothing special there.
Now I can do two things, both bad and good (to keep things confusing):
1: keep it as it is now. The teams members are stable now, you 'lost' members but you gained just as much. Unfortunately, team members in BOINC combined is not exact science. The good thing is that the oldest projects determine the things I mentions above, which I think is better.
2: change the sequence back. Your members in combined will be as before. But the newest projects determine the things mentioned.
I think you know my preference, but you are the users, you decide.
P.S. Of course BSy doesn't show this, they don't have the feature

The projects themselves are equal.
P.S.2. I haven't imagined a result like this

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