Tradition says there are seven colours of the rainbow when there is evidently an infinite number. Similarly, they say there are seven chakras. Maybe it’s better to think of an infinite number, with increasing “frequency” (I don’t have any other word) which goes from the base chakra (survival) through all the states traditionally taught (pleasure, self-esteem, love, self-expression, intuition) to the highest frequency (connection to spirit) in a spectrum of infinite subtlety.
Likewise, learnèd gurus talk of different layers of the body of man; physical, astral, mental, ethereal, spiritual. Again, we all need to see it as we need to see it, and I don’t believe there is a right or wrong way. If it feels right, in your heart, then it's right for you.