Yes I know I have a friend of my husband and I that raises tarantulas and she is very passionate about the fact that tarantula raising is only for the purist.
As I look over the information provided by eve it is more likely they (1 and 3) are BCC than BCA their tails are not short enough considering the information provided. But it is still possible of course that they are crosses as cross breeding on BCC and BCA seems to be popular.