Mokshya yes indeed it is little unusual. three things: 1. They are talking about the Ardhanarishwor which holds true because left part is Shakti and right part is Shiva 2. It can be just like our hands, nostrils etc eventhough they look the same but don't work the same or at least theoritically not he same. remember in Pranayama breathing from left nostril is considered calming and cool while breathing from right nostril is considered to boost up energy level and associated with fire. 3. it already declares it as Alakshya (meaning "which cannot be shown by any sign") and Niranjan (meaning "which cannot be seen by mortal eyes") so it is supposed to be beyond our perception. Only Bisuddha yogis and yoginis are able to see perhaps. that is my limited understanding talk to you later my yogini