For the use of тоже и также I have a rule that always works:
тоже: 2 persons, 1 action. John is here; you, тоже (are here)
также: 1 person, 2 actions: I study Russian; and также German.
However I find in an exercise in the web something in confict with this. There is said: Soviet Agency of Space selects persons as cosmonauts; and NASA ALSO selects persons as astronauts. Here тоже will be waited following "my" rule. But not, также is used.
Роскосмос объявил о дополнительном наборе кандидатов в космонавты.
.....
Напомним, что в октябре 2011 года американское космическое агенство NASA также начало набор астронавтов.
Is there a mistake in the exercise?. Unless and perhaps it is something byzantin we consider being in front of two actions (make a complementary selection) and (begin a selection). Thank you.