Your new coolant definitely mixed with the old one. This is not normal. Coolants don't change color like that.
Different types of coolants should never be mixed because some are not compatible with others and can cause coolant degradation. Different types of coolant are often indicated by color, which means the one in your car and the Caltex one are different types.
If I were you I would drain the coolant, flush the cooling system with demineralized water at least twice and then refill new coolant.
Out of curiosity how did you drain the coolant?