Okay first off. It is possible to have 2 bloodlines if you want two bloodlines.Here are the rules.
1.You must have 2 user parents with different bloodlines to obtain them.You cannot keep your old bloodline if you do so unless it was 1 of the parent's bloodlines.
2.The user CANNOT be your alt(s).It will not be tolerated and you will be instantly denied.
3. You need verification from the 2 users that are your parents to confirm it with an Admin.