They are both cleared from having multiple accounts.
About the SD; I see no intentional secret diplomacy. Both accused players are still quite new and might now be accustomed to more player standard games.
If you do not wish to play these players again, foe them and rate accordingly.
We shall go on to the end,we shall fight in France,we shall fight on the seas and we shall fight in the air,we shall defend our land whatever the cost may be we shall fight on the beaches we shall fight on the landing grounds WE SHALL NEVER SURRENDER