2 things Lithium.
1) I can't read the red text which is why I didn't address this earlier.
2) No, you can't be in two crews. It wouldn't make any sense. Go ahead and pick, I don't know if Antagonista wants you in TC per se, but right now the ball is in your court as long as there's no double jobbing.
But why did you message him to join your crew, right after he applied to TC?