There have been some really fascinating designs this year, many of them blatantly done by humans. Not only have they left evidence, they have come out and said it. This may seem to be fodder to the skeptics out there, but I have a different angle to propose. It is hardly a a new idea, but maybe if it is said enough, it will be taken into consideration.
Maybe, just maybe the something that is the creator of the "authentic" glyphs is using humans to translate for it. After all, all the early glyphs seem to point to getting us to unite as a people. Perhaps that is the task of getting humans to do the work too. If we get down and dirty in a project, if we become involved in the work, then it becomes more personal, something we might actually care about. It becomes ours.
It is fairly easy to pick out the ones made by us. We know the language of our planet and it shows in the symbolism we choose. It is sensible that we would speak more clearly to our own kind, where as those from outside might end up being more general in their images. When speaking to a person of a different culture, for clarity's sake, it is best to keep things simple. Mistranslation has caused wars in our own past.
The point is perhaps we need to look a little closer at those glyphs made by our own. There may be reason to pay attention to what we are telling ourselves, rather than wasting time nitpicking the details of who and how it was made.