Just wanted to say that me and the other two re-registered at the same time. This was after the problem with the accounts as a whole and there was a rush to do it. Actually when we paid and registered the first time we didn't do it together. My member number is 1171 , the other 2 were 1067 and 1076 so there was considerable time between payments and registration.
Tha fact that you didn't pay fee for 3 people at once doesn't vanish the fact that you registered 3 accounts within 4 minutes and logged in your Node accounts within 20 minutes.