Amir,
We do not see eye to eye on this matter, as you should know from our previous disagreement on the same topic. This assertion that some siddhis are literal, some are metaphorical and some are lies is entirely your invention, and does not occur anywhere in the Yoga sutras or other Yoga literature. You have arbitarily decided that x siddhi is real, y siddhi is symbolic and z siddhi is a lie, simply because this is what you believe yourself. It would be honest of you then to qualify your statements by saying it is your opinion, rather than to state it as a fact. This is very misleading and misinforms people sincerely asking for information.
Likewise, your assertion that the Yoga sutras is full of symbolic content is again entirely your invention and no Yoga scholars would agree with you. The Yoga darsana is a system of philosophy from the Sanskrit tradition. Like all systems of philosophy in the Sanskrit tradition, it is articulated in technical and precise language, giving definitions. It is written in pure prose. In fact let us look at the first few sutras:
1.1. Now begins the teachings of the science of Yoga
1.2. Yoga is the cessation of the modifications of the mind field
1.3. Then the pure self is revealed abiding in its natural state
1.4. At other times, the pure self is misidentified with the modifications of the mind
1.5. The modifications are 5-fold. They are either painful or not painful
1.6. They are correct knowledge, incorrect knowledge, imagination, sleep and memory
1.7. Correct knowledge is perception, inference and reliable testimony
1.8. Incorrect knowledge is based non-facts and non-real things
1.9. Imagination is verbal knowledge devoid of real facts
1.10. Sleep is the non-deliberate absence of modifications/or absence of awareness
1.11. Memory is the unmodified recollection of words and experiences
1.12. Repeated practice and renunication are the means to still the modifications of the mind field
1.13. Repeated practice is the sustained effort to still the modifications
1.14. Long, uninterrupted, alert practice is the foundation for stilling the modifications
1.15. Renunciation is the practice of detachment from desire
It is clear from the above that there is no symbolic content here. It is precise and technical language. It gives very clear definitions, then gives classifications and then lists and defines those classes and sub-classes. Very much in line with how the Sanskrit philosophical tradition writes.
Now if we look at the actual description of siddhis, we will find again it is technical and precise language:
3.21: By control over the the form of the body one can suspend the rays of light reflecting from oneself so that one becomes invisible to the onlooker. One can become visible again by bringing back the power of perceptibility
3.31 By control on the pit of the throat, one can overcome hunger and thirst
3.40 By control and mastery over the upwards flowing subtle force(udana vayu) one can walk over water, swamps and thorns without touching them. One can also levitate.
There is no room for ambiguity here on what the Yoga sutras is saying. It is in clear, precise and technical prose. Just because you do not think it is possible, does not mean you misrepresent what the sutras are saying.