So it seems to me that Apple changes rules as it goes.
I accept the fact that there is max of 3 Distribution certificates allowed. We can leave with it.
However it seems that there is now limit of only 1 Development certificate :-/
I don't see a logic in it.. It hasn't been the case just last year.
Now when I try to create 2nd Development certificate - I get error:
Could not create another Development certificate, reached the maximum number of available Development certificates.
But I only got 1 Development certificate.