Teferi's 1st ability & Token Casting Cost / Tokens with protection from Teferi [Fixed]

There are some tekens i am unable to bounce with teferi 1st ability.
-Demon from Priest of Blood Rite
-Karn's Construct from Karn's 3rd Ability
-Octopi from Kiora's 3rd Ability
Even Teferi's 1st is restricted by target's casting cost. TBH, token's casting cost should be 0, arent they?
.....this bug make me really curious what is the casting cost of all tokens in the game.
Token with protection from Teferi:
-Demon (5/5) from Priest of Blood Rite
-Karn Construct (8/8) from Karn's 3rd
-Octopi (8/8) from Kiora's 3rd
-Zombie (2/2) from Nicol Bolas1
-Vampire (1/1)
//Edited Title -Brigby
// Edited Title Tag from Investating to Fixed -Fiirst 9th Jan 19
-Demon from Priest of Blood Rite
-Karn's Construct from Karn's 3rd Ability
-Octopi from Kiora's 3rd Ability
Even Teferi's 1st is restricted by target's casting cost. TBH, token's casting cost should be 0, arent they?
.....this bug make me really curious what is the casting cost of all tokens in the game.
Token with protection from Teferi:
-Demon (5/5) from Priest of Blood Rite
-Karn Construct (8/8) from Karn's 3rd
-Octopi (8/8) from Kiora's 3rd
-Zombie (2/2) from Nicol Bolas1
-Vampire (1/1)
//Edited Title -Brigby
// Edited Title Tag from Investating to Fixed -Fiirst 9th Jan 19
1
Comments
Ridlle me this...
(And it's not from stopping planeswalker abilities! I can activate it just not target them)
In the example mentioned above however I am sure that my opponents hand was not full