First get everything checked out by doctors. Seriously, this is actually important even if you (OP) werent even seeing anything like this. To us, we
can not tell something that was created in our mind, or that originated from outside of it since all individual perception based on senses is
originated in the mind. Though some think that it is our perception that creates the things we perceive, i dont personally see it this way, as i feel
observance only changes the context of the "item."
As far as the different "types" of shadow people, i feel they appear in ways that will be better understood by the individuals brain and overall
perspective. if it was just a blotch of darker air moving around far off in the distance, it gets written off. Perhaps not so much showing us
individually what our minds can handle, but also our minds translating things into contexts which we can better explore. As far as them acting
"strangely," well, i think the cause for that will slowly become clear but is one of "those" answers which we need to search out for ourselves.
Perhaps it is you
who is acting strangely, and they are simply responding
As far as "paranormal," "supernatural," etc, i feel those words are deeply misleading. Things only get such a moniker because they are beyond our
current understanding, but there is no such thing as something which supersedes, or rises above, the natural world. It describes more ones position
on the events, rather than anything about the events themselves, and is incredibly telling in such regards.
Most will write shadows moving in organized, intelligent ways as something which already fits into their perspective. This enforcing of a present
bias, instead of a spirit of exploration based on the idea that we dont know everything. However, such an attitude can also be present on those who
saw a shadow move and attributed it to their already present bias of it automatically being a "shadow person." Such things simply work both ways.
Neither is interested in honest exploration, especially if it has the chance of crushing the current perspective bias. Quite frankly, its much easier
to simply chalk up everything unexplained in ones life to "standard" explanations based on ones very, very limited view into reality. The more
important thing is if one approaches a differing perspective present in another iteration (body) with respect and curiosity. i see it that way
because our individual perspective can never have more than a piece
of the "truth."
There is always
more to know, even about the things we know the most about. The overall concept of the universe has been the same since before
humans were around, we just put it into culturally relevant contexts based on our current understanding. The only thing we know for sure in this
regard, is that the only constant is change. If one explores enough, they might find that there are small changes and large changes along the
journey. The large changes are usually an effect of massive uprooting of current systems due to conscious progression within the particular context.
i found that this type of process is present within typical "learning" progress as well (such as school, science, etc). The first large change
might be when one suddenly feels "comfortable" with the topic at hand, and i think a natural point comes up here where we may misplace confidence in
the extent of our innately limited understanding. i call it the "teenage syndrome"